Yousuke has decided to live with Mikako because of his parents' remarriage. He is lustful for living with the opposite sex and looks for Mikako's underwear, but he finds out. Mikako, who has a disgust for Yosuke, physically dislikes him and rejects him. Still, Yosuke, who can't give up on Mikako, uses the aphrodisiac he bought to make Mikako a thing. Even though he hates it with his mouth, his body feels it...
