SDMUA-013 — Kuruki-San In Room 303 And Narisawa-San's Wife In Room 320 Don't Even Know The Rules Of This Apartment Building, So Why Don't We Just R** Them As Much As We Want?

Rei, who has been living happily with his wife, moves into his dream high-rise apartment. He looks forward to a new life in a luxury hotel-like apartment, but there are special rules created by the long-time residents. Rei happens to meet Kisaki, an old classmate, and they become close. But those rules cause the two of them to fall apart. Who will have the last laugh?