The cultural girls in the chemistry department are super sullen and lewd! I have always been weak in mind and body, disliked sports, and loved experimenting, so I enrolled in the chemistry department at school! I was dreaming of all kinds of fun experiments, but my female seniors wanted to study sperm, so my dick was used as an experiment!

The chemistry department at ○ school is full of plain boys. However, many of the girls are surprisingly cute. However, the curiosity of a girl who is a bit passionate about research is special, and she researches the genitals of junior male club members! A junior boy presents his dick to find out how erection and ejaculation work. And one day, a senior female club member's research mind turns into an erotic one.