Will the formerly peerless Tetsuya be able to lead a “normal” high school life?! Once hailed as the strongest within the illegal underground fighting arena, Tetsuya Yamada, a boy who once reigned undefeated in illegal underground fighting arenas, decides to leave the organization with the help of “Teach,” a man he deeply respects. The high school lifestyle he’s wanted for so long is finally within reach. However, on his very first day, he has a chance encounter with Anko Aihara, the granddaughter of a yakuza boss, who just so happens to catch a glimpse of the tattoo on his back!

On the outside he may look normal, but on the inside, he’s the strongest high schooler to ever live, but he will learn that walking away from that life is never without consequences.