Hikaru is a very beautiful female teacher with a huge bust. Nakata is seduced by the extremely seductive body of his homeroom teacher. One day, he accidentally discovers that the teacher and another male teacher are secretly having an affair. Jealousy arises, and he wants to possess this seductive body! Thinking and doing, Nakata drugs and takes Hikaru to an empty room. He takes over the body he has always desired and records it. Upon waking up, Hikaru is powerless to prevent the student from having her body. Not only that, Nakata also forces the teacher to witness the lovers giving oral sex to the three students. Then he finds a way to make the teacher resign. During this process, Hikaru realizes that she herself seems to be changing. She wants to enjoy more sex, be more proactive in threesome with the students...