Imaizumi Brings All the Gals To His House vol. 5 (manga)

Life has never been better for Imaizumi and his four lovers. With his new, spacious apartment, there’s plenty of space for them to have all the sex they want whenever they want! But when Imaizumi’s mother comes to visit his new place, will he really be able to convince her that he’s sleeping alone in that king-size bed? Meanwhile, the four girls start to think about their relationship in the long term. Imaizumi would never settle for monogamy, but it only stands to reason that one of them should get to be his legal wife!