GRMO-203 Human Observation: A busty erotic woman becomes a practice partner for her male friend who started working at a women's brothel, and inadvertently becomes craving for her friend's dick.

The two of them seem to be open friends, with the woman talking about her recent addiction to female-oriented brothels. The man started working as a brothel for women, but he wasn't very popular, so he came to ask for advice. While practicing massages, their skin touches and they get turned on. Things gradually escalate, and they even end up practicing actual sex, which is not allowed in brothels for women.