The teacher and the student are having sex in front of the mirror. The teacher asks the student if he would like to practice sex with her. The student says he would, and the teacher asks him if he wants to practice it by giving her a present. He gives her a diamond ring and tells her to give it to her lover on the day she gives it to him. She says she wants to do it soon, but she doesn't know where to hide the ring until that day, and she worries that her lover will find the ring no matter where she puts it. She asks the teacher to put the ring behind the books so that she won't have to hide it until he finds it,