The artsy girl in the chemistry club is incredibly lewd! I used to be physically weak and not good at sports, but I loved doing experiments, so I joined the school's chemistry club! I never imagined that this upperclassman, who wanted to conduct all sorts of interesting research, would use my penis as a lab table to study semen! HUNT-618

In an all-girls school, the chemistry club has one exceptionally eccentric male member. However, the girls here are unexpectedly adorable and filled with a burning curiosity for research, leading them to set their sights on this extraordinary junior! To study the structure of erection and ejaculation, the male member is forced to erect his penis… Unexpectedly, during the research process, the upperclassmen's research-oriented minds gradually begin to turn into lewd thoughts!!