Hikaru is a very beautiful female teacher and has huge breasts. Nakata was seduced by the extremely sensual body of the homeroom teacher. One day, he accidentally discovered that the teacher and another teacher had a wife secretly having an affair with each other. Jealousy gradually appeared, he wanted to take over this charming body! Thinking of doing it, Nakata drugged and put Hikaru in an empty room. He invaded the body he had always wanted and recorded it. After waking up, Hikaru was helpless to let the student get his body. Not only that, Nakata also forced the teacher to witness the scene of the mistress sucking the cock of the three students. Then he tried to make the teacher quit his job. In the process, Hikaru realizes that she herself seems to be changing. She wants to enjoy sex more, be more active when threesomes with students...