The ultimate fighting technique that combines the flesh and "gear technology" - "MEGALOBOX", the passionate battle of men who bet everything on it begins! Today, the mega boxer "JunkDog" also stands in the gambling competition arena in unauthorized areas. Although he has the ability, he can only make money by cheating in the game. He is anxious about his "present". However, he meets the lonely champion Yuuri, and as a mega boxer, as a man, he challenges his "present".