On her way home from school, Yui is suddenly approached by a strange older man. He offers to treat her to a meal, and with no suspicion, Yui agrees to go with him. The man claims he's skilled in hypnosis and asks her to help him practice. As Yui agrees, she gradually begins to lose control of her own mind. Under the man's control, she's treated like a toy—urinated on, made to squirt repeatedly, and has her anus played with. When the hypnosis finally wears off, what kind of state will Yui be in?