Yuuma Mukai
Yuuma Mukai
Kanji 向井 ユウマ
Rōmaji Mukai Yūma
Alternate Names Yuuma Kashiwagi
Ataru Kashiwagi (Real Name)
Yuuma 3 (During Third Stage of "Symptom")
Personal Info
Gender Male
Birthday December 8
Age 17 (Season 2-Season 3)
18 (Epilogue)
Height 170 cm
Weight 58 kg
Status Alive
Family Shin Kashiwagi (father/creator)
Chitose Kashiwagi (mother/creator)
Principal (guardian)
Ataru Kashiwagi (younger twin brother/original)
Yuri Kashiwagi (younger sister)
Koyori Kanda (youngest sister)
Professional Status
Occupation 2nd Years High School Student
First Apperance Chapter 11

"There's no meaning to death, there's no "Country of Despair", you cannot meet people who died again! Sorry, mate! You gotta live with your despair!"
– Yuuma Mukai tells to Mizuki Kurashina, Chapter 39

Yuuma Mukai (向井 ユウマ, Mukai Yūma), or known by his real name Ataru Kashiwagi (柏木 アタル, Kashiwagi Ataru), is the protagonist of the second and third part of the story. He is the twin older brother of Ataru Kashiwagi, although it's later revealed that he is actually Ataru's clone.

Appearance Edit

Like his original, Ataru, Yuuma is of an average height and build, with gray eyes. He has short black hair with bangs, and a cowlick towards the back.

Personality Edit

The beginning of Real Account II depicts Yuuma as a rather friendly person. Though everyone is immersed in the ever growing Real Account, Yuuma values friendship and explains to his friends that he doesn't have an account there. His girlfriend and long time childhood best friend, Nanako Yuzuhara is the only one who knows that in fact, he's more addicted to Re-aca than the others. He's also concerned regarding other people's problems, such as Ayame Kamijou's brother complex and Chiho Fujimaki's embarrassment at her shameful photos leaked to the world. He offers help and is good-nature overall.


Yuuma's "true" color

However, Mizuki Kurashina declares him as someone who is "empty" when they first met, claiming that Yuuma's someone who is the same as him. This causes Yuuma to be wary about the said character, and he tries to evade him, something that's not really happening because Mizuki is intent on ripping Yuuma's hypocritical mask off to see his "despair". Later, Mizuki reveals via reading Yuuma's diary entries of his phone, exposing Yuuma's misanthropic views, and the fact that he finds the world boring. Yuuma's phone also contains the voice recordings of every single grateful message sent to him, claiming that, "he must've listened to it every night".

Yuuma's third stage of the "symptom" in his imagination

As Yuuma reveals his true color, he acts brutal and disrespectful towards people who stand in his way, claims that it's a waste he acted like a "good person".

Later, it's revealed by Ataru Kashiwagi that Yuuma's personality changes is due to him suffered a "symptom", Ataru also said his "symptom" level is slowly start to reach to the third stage, which he will gone berserk and kill any people whatever he like, like how Koyori Kanda did during her third stage of the "symptom".


Early StoryEdit


Young Ataru and Yuuma

Ataru (Now named "Yuuma") is a clone of Yuuma Kashiwagi (Now named "Ataru") created by their parents with using CAP Technology. Due to hiding the truth, Ataru is thought to be twin brother of Yuuma. During their childhood, the twins are always disguises themselves to plays the football. The twins were enjoys to playing football so much, until one day an accident happened to Ataru. Due to Yuuma disguised himself as "Ataru", the actual Ataru has thought to be "Yuuma". After the accident, "Yuuma's" parents wants to protect him from Masahide Eniguma's hands, so they used CAP Technology on "Yuuma" to duplicated his body into two. Yuuma's original body is used as a corpse at his "funeral", while the duplicated body was sent into an orphanage by his parents.

After the accident that lead to the creation of "bad Yuuma", he grew up in an orphanage under the name and persona of "Yuuma Mukai". Due to the accident, he doesn't remember anything at that point. Yuuma's early memories consist of a ceiling and an old lady, and it's only explained to him that his name is "Yuuma". During Yuuma's times in orphanage, he meet Nanako Yuzuhara on the playground. Both Yuuma and Nanako talking each other and become friends afterward.

Chapter 1-10 (First Season)Edit

Yuuma make a cameo appearance in the end of Chapter 10, which makes Ataru shocked that his older brother is still alive.

Chapter 11-70 (Second Season)Edit

Yuuma first appeared in Chapter 11, he went to the school while meeting his friends. Yuuma shocked his friends and tells them don't play Real Account while walking around. His friends said that Yuuma is the only one who haven't uses Real Account yet and tells him to joins it as well, but Yuuma deny it and said he is not interests at SNS stuffs, he is more interests at playing together with his friends than talking with random people at internet. Then, Yuuma is having fun with his friends at school.

After Yuuma's friends back home, he shows his real personality, that he is actually did uses Real Account and he's more addicted to Real Account than the others. Yuuma believed he have 1893 followers that he considers as a "real friends". Yuuma then asks his childhood friend, Nanako, that was he a bad person or not, due to the fact he hiding his interests at Real Account. Yuuma also stated that he know he can't keep his interests in secret forever, and he should have become an actual friendly person that does values friendship more than internet, but he simply can't. After the conversation, he asks Nanako if she can come to his home or not, she then agreed and follows Yuuma back to his home. After back home, Yuuma feel nervous due to the fact Nanako is in his home. Nanako stated it's okay to do "it" as long as it's Yuuma, Yuuma then wanted to kisses her but she stopped it and said they should taking a photo first. During Yuuma taking photos, Nanako kissed Yuuma's face. Soon, Yuuma noticed his smartphone shows a strange scene and suddenly become flashy, which caused Yuuma sent into the Real Account internet world.

After being sent into the internet world, Yuuma wonders what's going on. He saw Marble and stated that everyone was trapped into the Real Account internet world. Soon, Yuuma's smartphone is ringing and calls Nanako that he was transferred into somewhere else, she then stated that what Marble said is true due to TV showing the Real Account world's scenes and that his body is still in his home. Yuuma has completely no idea what's going on currently and Marble announced they will play a small trial named "True Follower Diagnosis", to seeing how many followers still want to follow the players even if they will be kills soon. Yuuma, at first, believed his followers will not unfollow him due to they're his friends, he then shocked that a lot of followers unfollow him. After Yuuma's followers reduced to only one, he wonders who's it and it's Nanako. Yuuma then talk with Nanako and said that he realized that the friendship in internet was fake, but Nanako stated that she will unfollow him due to she is too scared. This caused Yuuma feel despair and wonders if he will die soon. Soon, Yuuma realized he should not die and finding a solution of how to survive. Yuuma soon saw Ayame Kamijou crying that her brother wants to unfollow her, he then come close to her and said she need to "combine" with him. Ayame misunderstood Yuuma's words and thought he wants to having sex with her, Yuuma explains that they should follows their account each other. Because of this, Yuuma and Ayame survived the trial. Soon, Yuuma wonders what's number Ayame is but she's crying due to the fact her brother unfollow her. Yuuma slapped Ayame's face and tells her must survives but Ayame slapped him back. She said that Yuuma is a bad person for slaps a girl, she also said that she should be the one who said this and she will have kill him if he died.

Soon when No Like! Game started, Yuuma told Ayame to have works together but Ayame shows an annoyed face and said why would she works together with him, which makes him thinks what's wrong with her and wonder what kind of person she is. When Chiho Fujimaki's naked image showed in the big screen, Yuuma said that the trial is troublesome while giving a thumb at Chiho. Ayame asking what's that thumb for and Yuuma said he didn't giving a thumb at all. Soon after figured out how to surpass the trial, he decided to taking a brunch of photos of his "ugly" face. This caused everyone looking at Yuuma and wonder what's he doing. Ayame tells Yuuma don't fooling around but he said he is serious about this. Yuuma stated that if anyone taking a bad photos they will able to surpass the trial when those photos shows on big screen. Soon when it's Yuuma's turn and shows an random image on big screen, he was disappointed at his bad photo wasn't shows up and wonder why did he taking an meaningless image. This caused Yuuma have a hard time for this and keep thinking which button should he choose to, until he realized that there's one more button that can be chosen (Which was hidden on a box that players put their smartphone in). Because of Yuuma discovered the third button and clicked on it, he is able to surpasses the trial. After the trial was ended, Ataru tells Ayame that her interest is pretty funny, in which she embarrassed and stated those plants was cute. Ayame stated from now on she will works together with Yuuma.

After Yuuma and Ayame moved to the other place, Marble shows up and told everyone goes inside the room. Yuuma wonder what kind of room is it, he noticed there's a lot of comments shown in the big screen. Yuuma wonders if this was related to the new trial, Marble shows on the screen and stated it's indeed related to the new trial, known as Real Live Game. After knowing the rules, Yuuma and Ayame tried their best to getting a lot of viewers but it's failed. Being no idea what should they do, Yuuma suggests they need to watch the other live shows for knowing how they receives viewers. Even after watched other lives, Yuuma and Ayame still have no idea what should they do so they asks the viewers for it. The viewers suggests Ayame to shows her naked body to them, at first, they were shocked and said it's no way for Ayame to do so, but as they have no ideas they have no choice but follows the viewers' suggestion. Soon, Yuuma finds out a good idea and blocks the screen. Yuuma tells Ayame to uses Marble's image that she cams earlier, which doing voice acting and imitating Marble's talking pattern on it. Ayame follows Yuuma's idea and do so. In the whole live, Yuuma, while voice acts as Marble, he explains that the "reason" why this trial is created, was uses to kills the audiences in real world. This caused the audiences so scares at the "fact" they will die. After the trial is ended, Yuuma reveals to the audiences that it's fake, which caused the audiences angered at him. Yuuma then told the audiences that if they wants to bash him, then shown themselves in front of him next time. Then, Ayame wants to thanks Yuuma for saves her from strips her clothes. Before Ayame could do so, Yuuma noted that Ayame wears a pink panties, which she feel embarrassed and ripping his face. Yuuma said sorry to Ayame and that he didn't fully saw her panties.

Chapter 71-185 (Third Season)Edit

During August 27, Ayame and Chiho went to Yuuma's house to celebrating Ayame's birthday. After knowing the reason why the girls comes to his house, Yuuma said happy birthday with a sad face, which Ayame annoyed at this and tells him stop playing around. Ayame stated that she also wants Mizuki to joins the party too but they don't know his phone numbers, so Yuuma decided to calls Mizuki by himself since he know Mizuki's phone numbers. When Yuuma knows that Tamae is the one who takes the phone, along with the girls was surprised at this and wonders if she's in Mizuki's house or not. When the group comes into the beach, Mizuki is sad and had no energy due his fear of water and the sun. Yuuma pushes him into the water and tells him to not be stubborn. Mizuki is sad again due to the raw meat being cooked, and asked Yuuma if he can live like a normal person or not. Yuuma answered with Mizuki can as long as he really wants to do so, as he suddenly agreed with Yuuma.

Half years after the event of Second Season, when Yuuma went to school, a group of student is surrounding him. They still believed Yuuma is the one who started Real Account incident, due to the fake news Imari posted on his website earlier back during the Big Flame Festival. As the group keep repeating the same words non-stop, Yuuma wants to punches them but it's stopped by Ayame. While Ayame tells Yuuma to hold his anger, he told her to shut up and get lost as they're no longer a partner after the Real Account incident was ended. Soon, the groups went to finds Yuuma again to causes some troublesome, which Yuuma found it annoying so he wants to punch them. Before he do so, Ayame punched one student of the group and stated she can't hold her anger anymore due to the troublesome they caused. Yuuma, as seeing Ayame's reaction, he decided to run away together with Ayame and stated that they're still partners even after the Real Account incident.

After Yuuma and Ayame hiding themselves from the group, he notices his phone shown an Real Account logo, which shocked him and Ayame. Marble has reappeared as "True Marble", he chose 30 players to join the Real Account Tower and play the death games once again, Yuuma is chosen as one of the 30 players to be play at Real Account Tower. After the poll was ended, Yuuma showed to be hype at this due to he can finally found his chance to destroy Real Account company and saves Nanako.

When the group arrived on the crushed Real Account company area at the night, they reunion with Mizuki and Yuuma wonder what's going on now. Soon when Marble is about to reveal the poll result, Yuuma told Marble stops it and revealed Ayame's panties in front of audiences, which result of her followers increased and she punches him for being embarrassed. After the result is out and Tsugurou Koujirou's death, Yuuma said that his plan of revealing Ayame's panties is successes. As Ayame wonders what's he means, Airi Homura explains that based on Real Account company's past actions, obviously this isn't a normal poll and it can leads to someone died. Yuuma also explained that due to Ayame's action at morning, a lot of people don't like her and they won't choose to follows her for that reason, which is why he revealing her panties to the audiences so that her follower numbers can be increases. After the explanation, Marble tells the chosen 29 players that they will plays the trials at Real Account Tower and that the final showtime is finally begun. Soon, along with other 28 players went into the tower.

During Fake News Island trial, it's revealed that Yuuma has been fully regained his childhood memory.

Chapter 186-191 (Final Arc)Edit

One day after the end of Fake News Island, along with Aiji and Sayaka were seeing Ataru's funeral. Mizuki noticed that Yuuma was angered at the fact Ataru was killed by Real Account company. Then, Yuuma told everyone that since they will only have one trial left, they must have to works together and survives the trial so the real peace will finally come. Soon, along with the remaining 14 players went to the tower top. After they reached to the tower top, Yuuma calls Marble to shows himself, although it's Masahide who appeared in front of them instead. Masahide asks them for what wish they wanted to grant first before they starts the new trial, so that it's easier for him and the company to prepare it for them later. Then, everyone revealed their wish was hope internet world doesn't exists. Masahide cried for their wish because that is the main purpose why the Real Account incident happened in the first place.

In the whole conversation, it's revealed that Real Account's main goal was creates a new world where the internet and evils doesn't exists, so that people can be lives peaceful without getting trouble. Since Masahide now know what's the remaining 15 players' wish was same as his, he suggests Yuuma and his friends to joins their company so they will destroys the internet world together. Yuuma stated he won't join them and said that while what Masahide's thought about internet isn't wrong,

Yuuma stated he will changes the world by his own way

the fact that he and his company killed so many innocent people just to archives their goal was ridiculous. Masahide doesn't agree Yuuma's statement on how he shouldn't kill people, and told him that his plan wasn't wrong especially with the existence of "No Smartphone Club". Yuuma then tells him that he has been made a promise of destroys Real Account company, and that he will use his own way other than killing to stop people using internet. After the conversation ended, Marble shown up and announced the new trial they will play was Real Follower Battle.

Marble overpowered Yuuma's groups

After Marble explained the rules of new trial, the trial was started. During the trial, Yuuma orders Mizuki, Sayaka and other players with higher battle points to works together to fight Marble, while telling the players with lower followers stay back. Soon, Suzuri Mikura said she will fight against Marble all by herself. Yuuma wants to stop Suzuri to do so but it's too late. When Magura was almost kill, Yuuma saves Magura from Marble's attack. When noticed Marble's followers/battle points keep increasing, Yuuma and the other noticed that their followers are deceasing and the followers choose to follows Marble instead, due to fear of death. With Marble's high battle points, he is easily overpowered Yuuma's groups. Seeing how their followers keep reducing, Yuuma wonder what should he do in order to regains their followers back, what should he do in order to change the internet world, and what internet users actually wanted.


Everyone went to faces Marble

After Marble's followers was increased to over 100 millions and attacks the other players, along with Mizuki, Sayaka and Shuu protects them from being killed. Yuuma stated that he can't comes up a second plan at a moment so he don't know how to defeat Marble. Due to this, Mizuki decided to fight aganist Marble all by himself, to gives more times for Yuuma to thinking how to defeat Marble. While Yuuma still thinking about the plan, he noticed that everyone was crying due to being hopeless and can only rely on Yuuma's strength in the end. Soon, Aiji said that instead of just sitting there to watching, they should just joins to fight as well and try their best to help Yuuma as much as they can. Then, along with every players come to faces Marble. After everyone successful to capture Marble, Yuuma went to punches Marble and they successful to "defeats" Marble.

After Marble's "defeated", he standing up and the trial is still haven't needed yet, due to his followers has been increased to over 12 billions which almost same as Yuuma's. Marble then tell them that third stage of "symptom" are can't be healed and the only way to heal it was having both original and clone fusion as one, which is impossible as Marble already killed Ataru in previous trial. Soon, Marble's true identity was revealed to be Shin Kashiwagi, the father of Yuuma and his siblings. Then, Yuuma stated that while he already knew that Shin was Marble, he is still shocked by that fact. Ayame wonders how did Yuuma knew this and he explains that he knew it based on Koyori's flashback when she went berserk, and how Ataru and Yuri were shocked at Marble's true face. Shin explains his past and how he become Marble. The reason why Shin created Yuuma and Koyori in the first place, was because he wanted to experimenting human's emotion and how will the clones kills their own family. After the explanation, Shin told Yuuma that since he have no chance to win the trial, he should have just follow Masahide's request to pick third choice so there's no more unless sacrifices happened.

Yuuma gives Marble a punch

Yuuma answered no and said he will never claims Shin as his father, he also stated that he will destroys the Real Account company no matter what and he will never joins them. Soon, the trial was continued and Shin's body becomes gigantic once again.

With this situation, Yuuma comes out a one last plan to defeat Shin, to surviving in 5 minutes and gives him a finishing blow at the last minutes. Soon, everyone starts run away and tries their best to dodge Shin's attacks, while informing internet users to helps them by follow Yuuma's account. In the last minutes, when Yuuma is almost get punches by Shin, Mizuki went to save him by sacrifices himself and killed by Marble. Yuuma was shocked at Mizuki's sacrifice and even then he still went to give Shin a "finishing blow". When Yuuma punches Shin, his followers suddenly increased rapidity. While Marble is still alive, Yuuma destroyed his phone which caused his followers reduced to zero. When Yuuma is almost giving Marble a finishing blow, he releases Nanako which revealed that she's almost die due to her injures never healed after all these times, this angered Yuuma and went to kill Marble.

When Yuuma almost kill Marble, he heard someone told him to stop. Yuuma was confused and asking who told him to stop, Magura stated it's just Yuuma talking to himself. Soon, it's revealed that Ataru is still alive but his soul was living inside Yuuma's body. Because of this, Yuuma's "symptom" was finally healed. Then, Yuuma asks Ataru why he stops him from killing Marble, Ataru reminds him of how Real Account trials usually went and Yuuma realized that it's all trap. Yuuma explains that if he killed Shin, then every internet users will becomes the mindless monkeys due to Real Account company set a virus inside every internet user's brain.

Yuuma and Ataru defeats Shin

This makes Yuuma decided to punches Marble instead of kill him. Soon, when Masahide attempt to kill Shin with a gun, Aiji went to stop him and Yuuma explains that Ataru already predicted that Masahide will kill Marble if their plan was failed. Then, Yuuma went to punch Marble without his follower's counts to ends the last trial. He stated that the internet will still be needed for human and he will continue using internet. After Yuuma and Ataru punched Shin, the Real Follower Battle trial was finally ended.

After the end of Real Follower Battle trial, Yuuma went to releases Nanako from the tank and leaves the tower together with the others. As everyone leaved the tower, Yuuma wonders where did his father Shin and Masahide gone and realized they wants to commit suicide inside the tower. After Mizuki and Nanako has been sent into the hospital, along with Ayame went to see Mizuki. Mizuki was surprised that even though he lost his left arm, he is still alive and survived from Shin's fatal blow. Yuuma being angered and said Mizuki should had never try to sacrifice himself to saves the others, but Mizuki said he don't wants to see Yuuma's death so he willing to pay anything to saves him. Then, Yuuma stated he will become Mizuki's left arm and help him forever.

After Real Account Tower incident, Yuuma replaced his smartphone with a hand phone instead.

Chapter 192 (Epilogue)Edit


Yuuma in Epilogue

10 months after the end of Real Account Tower incident, along with everyone was told to went into hospital to see Karua's newly-born son, Mamoru Sakurame. When Ayame and Chiho arrived, they told Yuuma to reuses his smartphone again for easier to communicate, but he said no because he was getting tired of using internet. Yuuma said that Karua's son look like Akuto. After hearing Mizuki stated he wants a son with Yuuma, both he and Ayame was shocked and told Mizuki to shut up.

As Yuuma saw a news of two middle school students committed suicide, he wonders that if it's a right thing for people keep using internet or not in this world, although he claims that there's still have a good sides for internet world too. Then, he welcomes Karua's son came to "the world full of destruction but still deserved to be loved". Soon, along with the others took a group photo and uploaded on Magura's internet account.

Appearance in Other MediaEdit

Volume 0Edit

Yuuma make a brief cameo appearance in the end of Volume 0 light novel.

Magazine Boys' Valentine!Edit

Yuuma appeared in the bonus chapter Magazine Boys' Valentine!. In the bonus chapter, it is revealed that Yuuma masturbates 9 times a week.


  • Prediction - Thanks to Magura gives Yuuma an Dynamic Password, he is allowed to use "the power of the God". Yuuma can predict anything and the chance have at least 95% true. Although Yuuma lost this ability after he defeated Zui.



  • Yuuma has received four kisses in the series so far, the first kiss is from Nanako, the second and third kiss from Ayame. The fourth from Mizuki.
  • Yuuma may be a Street Fighters fans as he did a Denji Hadoken (In which the pose look similar to Denjin Hadoken) move in Chapter 141.
  • Yuuma has be awaken into the third stage of "symptom" in fourth times so far. Although it's returned to the second stage afterward.
  • Yuuma's wish that want to be archive by Marble is "Goes to school and live together with Nanako and the friends I meet at Real Account death games."
  • Yuuma may be ambiguously bisexual. As he seems to not mind getting intimately close to males (going as far as to letting Mizuki nuzzle and touch him as well as actually kissing him with no hesitation in Chapter 175). In a mini chapter, Ayame seems to confirm that Yuuma swings both ways.[1]
    • After having a phone call with Chiho, Chiho asks "So Yuuma-kun really does swing both ways huh?" which Ayame answers with "I guess so.."


  1. Shizumu Watanabe's twitter
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