Chifuyu Matsuno/Synopsis

History
On the first day of his first year in middle school, Chifuyu, who was regarded as a infamous punk at the time, was called out by one of the upperclassmen. He beat up his "Sempai," declaring that he didn't talk polite to anyone and that he himself was the authority. Students followed him around, commenting on how badass he was and how he had the strength to rule Japan. Chifuyu doesn't like the idea as he dislikes people who abuse their power. Later in the day, his classmates tell him about Keisuke Baji, who was repeating the first year and who probably was a delinquent. Chifuyu goes to check on him only to see him diligently reading and writing, sporting glasses and slicked-back hair. He leaves him alone but comes back later to confront him one-to-one. However, he notices Baji struggling with writing a letter and helps him, noting that despite appearances, he wasn't a "poindexter."

At the end of the day, Chifuyu gets stopped on the way home by the biker gang the upperclassman whom he beat up earlier. The members of the biker gang start a brawl against Chifuyu alone. However, he gets overwhelmed by the sheer number of members fighting against him. Luckily, Baji shows up and beats up the rest of the members by himself, declaring himself as a captain of Toman and Chifuyu as a friend. He then invites Chifuyu to eat Peyoung Yakisoba with him, splitting it when there was only one bowl left.

Valhalla Arc
Chifuyu is first shown on the ground of the broken down arcade surrounded by the members of Valhalla, getting beaten unconscious by Baji. The other Valhalla members were surprised that Baji went as far as he did, noting Chifuyu was Baji's retainer and that they were close. During the rest of Takemichi Hanagaki's confrontation with Valhalla, Chifuyu stays unconscious.

The next day, Chifuyu appears on a swing set in a park and as Takemichi walked past him, Chifuyu asks him to sit on the swing next to him. Not realizing it was Chifuyu at first, Takemichi ignores him but quickly remembers who he is as Chifuyu started talking about Baji. He says that he believes Baji helped Takemichi out by knocking him out during the nomination ceremony so that he wouldn't get in more trouble and that Baji spying in Valhalla to get at Kisaki.

On the way to a meet up with Mikey and Draken, Takemichi questions Chifuyu if Baji told him he was a spy. Chifuyu says that he didn't but he knows Baji well enough to know that he is probably was. Not to be left behind, Chifuyu begins an investigation on the outside. After the meeting, he makes a deal with Takemichi, telling him that he'll help him become Toman's leader in exchange for help in his Kisaki investigation. They go to Osanai to inquire about Kisaki. After the inquiry, Chifuyu speculates that Kisaki is Valhalla's secret leader.

The day before the battle, Chifuyu calls Baji to meet up with him and Takemichi. Chifuyu tell him that he can stop acting as a spy because he has information about Kisaki. Baji tells him he doesn't know what he's talking about and is part of Valhalla, not as a spy.

During the battle, noticing Takemichi being intimidated, Chifuyu stands behind him, reassuring him that he will have his back and that everyone gets scared when fighting but that he can harness that fear. After the two gangs fight back and forth, Baji gets thrown down the pile of cars after hitting Kisaki in the head with a pipe. As Baji gets up to fight Kisaki, Chifuyu gets in front of him. He tells Baji to not take down Kisaki, as then he wouldn't be helping Toman. Baji, without hesitation, hits Chifuyu out of his way with his pipe and tells him that he doesn't care about anything he has to say. Frustrated, Chifuyu tells Baji that as vice-captain, he should be looking out for the captain, even if that means that he'll need to fight. Baji then tells Chifuyu to fight him and that'll he'll even give him a 10 second head-start. After the 10 seconds are up, Takemichi tackles Baji, and Chifuyu admits that he can't hurt him. But suddenly, while Baji is in Takemichi's hold, Kazutora comes in and stabs the captain. Chifuyu grabs Kazutora's collar, pulls him away, and yells at him, however, Kazutora is spaced out. Baji, bluffing his injuries, goes back to fight Kisaki, who is on top of the piles of cars, but not before punching Chifuyu to stay out of his way. But after succumbing his stab wound, Baji is rendered immobile in front of Kisaki. Chifuyu rushes to Baji's aid and yells at Kisaki, asking what he did. Kisaki tells him that he didn't do a thing and Chifuyu notices the pool of blood underneath the captain.

Chifuyu lifts Baji from the ground after he stabbed himself as he gives Takemichi his final words of advice. In his dying words, Baji asks Chifuyu for Peyoung Yakisoba, to which Chifuyu tells him that he'll pay. Baji thanks him before dying in Chifuyu's arms and Chifuyu cries out in mourning, regretting that he didn't do enough for him.

Two weeks after the battle, Chifuyu can be seen in front of Baji's family grave. He brings half a bowl of Peyoung Yakisoba, reminiscent of the first time they met. He then breaks down into tears, frustrated that Baji went out thanking him and is unsure of what to do next.

During the meeting to conclude Bloody Halloween, Chifuyu gave the final speech about the future of the Toman's first division. Earlier, Mikey had paid him a visit, asking him if he wanted abandon the first division. Chifuyu had thought about leaving Toman after the death of Baji but decided to continue the division in his memory, nominating Takemichi to be the new captain.

Takemichi reunites with Chifuyu who tell him that he is Toman's top admin. The two then go to an admin meeting at a restaurant. At the meeting, Kisaki appears to ask for Chifuyu's and Takemichi's time. Kisaki leads them to his office where he first apologizes for what happened in the past on Bloody Halloween, much to Chifuyu's surprise, though he expresses doubt. Kisaki pours the two drugged drinks for them, taking back his apology before Chifuyu and Takemichi pass out.

When Takemichi wakes up, he and Chifuyu are both tied up to chairs, though Chifuyu had woken up earlier and had subsequent bruises from Kisaki's beatings on his face. Kisaki starts kicking Chifuyu for ratting them out to the cops. Chifuyu admits to being a snitch and asks Kisaki to leave Takemichi out of the situation as he had nothing to do with it. Kisaki ignores his pleas and shoots Takemichi in the leg right before shooting Chifuyu himself in the head, killing him. But before he dies, Chifuyu tells Takemichi about how Toman has changed for the worst and that he leaves Baji's will to him.

Right before Kisaki shoots Takemichi, Kazutora comes to rescue him, but wanted to save Chifuyu instead. He explains to Takemichi how after he got out of prison, Chifuyu came to pick him up and told Kazutora how Toman has gotten rotten. Kazutora then, unbeknownst to him, leads Takemichi to Naoto, who arrests him. Takemichi is taken to an interrogation room where he is shown a video Chifuyu recorded that was to use against Toman. In the video, he is shown trying to calm down Takemichi, who had found out Hina was indirectly killed by him.

Black Dragon Arc
Chifuyu appears at Takemichi's house after he got beat up by Taiju. He gives Takemichi and his old middle school friend's information about the Black Dragons before pulling Takemichi outside. He takes him on ride on Baji's old motorcycle and tells him to stop stressing about this conflict, as Baji won't have wanted to see him like that. Takemichi then tells Chifuyu that he is a time traveler and about his experiences. Chifuyu confesses that somehow he always knew Takemichi was as time traveler and commends him for trying to help everyone. He says that he'll have Takemichi's back.

During the next Toman Admin meeting, Chifuyu gives Takemichi an incredibly vague plan to follow in order to help prevent Hakkai from leaving the gang. His plan ended up failing, but they both decided to tag-along to Mitsuya's negotiation confrontation with Taiju.