Mayu Komikawa is a female nurse working at a high school, she has a beautiful and gentle appearance but is extremely lascivious. Due to not having a boyfriend and having a high sexual desire, she even boldly brings a sex toy to work to satisfy her sexual needs. However, that is not enough for this lustful girl. A male student goes to the health room for a check-up because he feels tired and unwittingly becomes the target of Komikawa. She starts stripping off the boy's clothes and continuously massages his erect penis. The curiosity and novelty have prompted this male student to follow what she teaches, including engaging in sexual activities.