Although he had perfect conditions, Professor Li from the University of Engineering, who lived with a sense of failure due to numbness, stumbled upon a woman with a mole on her buttocks in a video sexual relationship submitted by a student as a project and fell in love with her. Students are threatened sexually and will receive special orders to find Spot Girls no matter what. However, due to their relationships with many women, they cannot remember them. Therefore, they use hypnosis to explore their memories and recall the women who had sexual intercourse. The professor searched for the Spot Girl in the video regardless of student or professor identity, but tasted the taste of failure and was frustrated