Akoko has a straightforward and honest personality, and acts immediately on what she thinks, unable to lie to herself or others. By her side is her best friend since third grade, Miyuki, who she has known since they were in elementary school. On the first day of school at the start of the new semester, Naoki, the most popular boy in school and the driving force behind attending the all-girls school, has unexpectedly repeated a year and is now in the same grade as the two of them! Akoko falls in love with Naoki at first sight and begins to approach him in a very straightforward manner. Miyuki declares that she doesn't like him, saying "I think he's cool, but it doesn't feel like love," but Akoko senses Miyuki's suspicious movements. The first to strike wins! She confesses her feelings to Naoki.

Houtaro and friends are suddenly attacked by Glion. As they struggle against enemies that appear one after another from a space-time gate, they discover that enemies have been sent from the future! To protect the present and the future, Houtaro and Rinne travel through time and space to the devastated future. Thus the final battle, with everything on the line, finally begins!

A delinquent who swore off fighting and love is tested when the leader of a rival school moves into his family's candy shop.

Sahoko, an unremarkable high school girl, despises good-looking boys and has sworn off love after experiencing deep emotional pain. But her life takes an unexpected turn when she meets Kouta, a gorgeous pop star. As she gets to know his passion for his fans and his kindness, she realizes that he is different from the boys who have hurt her. Despite her strong resolve, she finds herself falling for him. However, Sahoko learns that Kouta, too, has made a firm decision in his heart to avoid special bond due to his own painful past.

Tsukasa Kiriki, the only son of a wealthy family, runs away from home because he admires the legendary delinquent Murakoshi, who has helped him since he was a child. He runs away from home and volunteers to join the "BEAST", the strongest team in the warring tribes era, but is turned away and meets Yoji Kawanaka on his way out. Yoji, together with Hisao Nakamura and Eiji Iwami teach Tsukasa how to be a delinquent, and the four become friends. Toshi, the seventh generation of the weak “Gokurakucho” team, asks them to join him in his fight against the “Hiroshima Night's”. Trying to avoid a fight, former Knights executive Hisao goes to see the head of the Knights, Hiro, and is wounded. Angry Tsukasa and the others are ready for the fight, and the battle between the Knights and the Gokurakucho begins.

Kondo Shizuka works at a design company by day and leads the Shinsen-gumi by night. Though a yakuza, he dislikes conflict and revitalizes his gang with fresh ideas. Months after the Onishu-gumi conflict, the new boss Kaifu poses a threat. While planning peace, Kaifu surprises Shizuka by proposing a negotiation. Displeased Onishu members hire legendary hitman J to kill him. Unaware, Shizuka meets Ayako, a high school girl who is a yakuza’s daughter. After surviving J’s attack with Inokubi’s help, Shizuka has three days to evade assassination before the peace talks.

J attacks Shizuka at home again, and even while hiding at Namakura’s, Shizuka is targeted. He realizes J has spared him multiple times. At the peace signing, J appears, but Omura is shot instead. Kaifu, angered, starts a conflict—but it’s a setup to frame Shinsen-gumi. Media exposure reveals Shizuka’s yakuza identity. When Ayako is attacked, she accidentally kills J. To protect her, Shizuka takes the blame and goes on the run.

The Shinsen-gumi–Onishu conflict escalates, causing defections. Naruto and Inokubi vow to prove Shizuka’s innocence, leaving Namakura and Hijikata in charge. They investigate while Shizuka hides with his boss. At the hospital, a scuffle implicates Shinsen-gumi, causing arrests and deaths. Seeing the situation and loyal members’ faith, Shizuka resolves to confront Onishu-gumi himself.

Shizuka decides to confront Onishu-gumi, joined by Naruto, Inokubi, and loyal members. Former Onishu members Namakura, Hijikata, and Gomada switch sides to Shinsen-gumi, strengthening their forces. In the ensuing war, Shinsen-gumi defeats Onishu-gumi, and Shizuka faces Kaifu in a final showdown. Victorious, he surrenders to the police, but Ayako clears his name. Shizuka returns to normal life, now more determined than ever toward the Unification of Japan.