At the brothel where Sakura works, a mysterious female customer suddenly appears. She confesses, "I want to eat your shit. It has to be you, Sakura. I love you..." Initially repulsed, Sakura gradually becomes intrigued as they talk while the woman eats her feces, her mind shaken by the sight of the woman climaxing repeatedly. This encounter becomes a turning point in Sakura's life, as a small curiosity and shock slowly begin to consume her heart and body.