After the Enma Syndicate's leader's death, the yakuza splinter into various factions, each harboring ayashimon, supernatural entities with unique powers. Maruo Kaidou, fueled by manga heroes, devotes his life to intense training, only to face rejection everywhere. When he meets Urara, a young yakuza boss on the run, she hesitates due to his humanity. Undeterred, Maruo craves the thrill of battling in this world of extraordinary beings. Embracing this newfound realm, he abandons his mundane existence to become Urara's inaugural gang member.