Judo athlete Shiori Hirizumi gets caught up in a strange martial art known as Dorei Jujutsu. Her opponent was supposed to be another judo athlete, but in reality, it's Rin Miyazaki—an enigmatic woman who claims mastery of Dorei Jujutsu. Confused by the bizarre turn of events, Shiori is lured in by Rin's sweet words and gradually learns submissive masochistic obedience. Using her existing knowledge and ambition in martial arts, Shiori experiences this new form of masochistic combat, but the outcome is extreme—her eyes roll back as she loses consciousness, sinking into a helpless state like someone trapped in quicksand. Rin remains supremely confident throughout, never losing her triumphant attitude even when suffering defeat or fainting. The clash between her perverted allure and the mysterious techniques of Dorei Jujutsu gives rise to an abnormal, intense fight like no other. This confrontation begins now.