Tokyo Revengers (Omnibus) Vol. 25-26 (manga)

When Takemichi finally came face-to-face with his old friend Mikey, he found a man totally consumed by his darkest urges. Just minutes after they met, Mikey shot him in cold blood - but before he could die, Takemichi found himself thrown ten years into the past. He's vowed to save Mikey from his descent into evil, but that'll be easier said than done.

Tokyo's delinquent underworld is now controlled by the 'Three Titans,' and Mikey is among them, ruling over a brand-new gang. To change the course of history, Takemichi decides to join a rival crew and confront his old friend head-on!