Suzuki Aoba (Kimura Keito), who has been frail and sick since childhood, suffers from asthma. Since elementary school, his classmate Iwase Sannosuke (Hasegawa Shin) has been used as a tool to vent stress, and he has lived a painful school life.

Although I have always been troubled by the hopeless cheerfulness of my classmate Kenshin Akazawa (Tsubaki Taiga), a rising star in the fighting world, one day, I got angry because Kenshin said he had no dreams. “You are an empty shell.…”

Set a goal to beat him up.Aoba calls Iwase, who has been bullying him, his “friend” and enters his Shark Gym.With the help of gym representatives Tokiwa Kanari (Gake Sano) and Iwase, plunge into the world of Mixed Martial Arts (MMA), the most powerful fighting technique that allows various attacks such as punches, kicks, and joint techniques!