One Night Lesson

Classmates Ryu Saezaki and Sakura Nogami are academic rivals who fight like demons everyday at school. Their bitter animosity changes when Ryu meets his rival's apparent twin, who has a much nicer personality and amorous feelings towards him. Talk about a change of heart! What's a confused high school student to do when his adversary suddenly wants to have sex with him?! Does Nogami carry a secret that could explain the situation? Or will Ryu reject any advances that come from someone who looks like his tormentor?