"Ya wanna fuck with me, Champion?"Takumi Tsukamoto is a former world lightweight boxing champion. Being both talented and handsome, he has it all. Takumi runs a boxing gym where he hired a new trainer. Surprisingly, it wasn’t Shin Toguchi　whom he used to have a relationship with, but... Takeshi Ihara. Takeshi is both Shin’s senior and a former champion, but he fell on hard times and even committed a crime. As Takumi and Takeshi get closer to each other by the day, feelings start to develop between them. They’re like two beasts who keep hurting and desiring each other! GYM side story has finally been released!!