"I want to know more about you..." Ui, who is in love with Ryoko-sensei, stays up all night reading the book she borrowed from her teacher, wanting to know more about her. Ryoko-sensei accepts Ui's aggressive seduction, takes her to the nurse's office, and teaches her gently but passionately. Ryoko becomes fascinated by Ui's charm, and Ui gradually becomes bolder. When the story of teacher and student who have made a forbidden pact is reversed, an unexpected ending awaits the two.