PFES-099 Share house with a wall that exposes female residents' butts: unlimited creampie

A man moves into a mixed share house in Tokyo and on his first day sees a female resident with her bare buttocks through a hole in a wall, getting licked and fucked by a male resident. The landlord explains the wall prevents romantic conflicts. The female residents use it willingly, and the newcomer realizes he can have sex with women who are not his girlfriends as much as he wants.