One Punch Man Manga Chapter 72

Gouketsu, revealed as the first Super Fight champion, explains how Orochi defeated and recruited him using Monster Cells. He forces the captured martial artists to either consume the cells or die. After Rosie transforms and attacks Dave, Choze kills her, eats a cell himself, and overwhelms the others.

Suiryu, driven by a promise to a civilian, defeats multiple fighters and then battles the monsterized Choze—ultimately overpowering him after redirecting his energy blast.

Impressed, Gouketsu offers Suiryu power and freedom as a monster. Suiryu nearly accepts but refuses at the last moment, ridiculing Gouketsu. Enraged, Gouketsu crushes him with a single devastating blow, leaving Suiryu critically injured.