Fuckin' Love Days

Mimura and Kase, who are living together, are receiving complaints from their neighbours because of the noise they make during sex. Mimura wants to move to an apartment with thicker walls, but he's worried whether Kase, who's living with him like a kept man, will come with him, and whether he intends to continue living with him. Mimura tries to find out Kase's true intentions, but he just goes along with it, saying, "We can just have sex without making any noise," and ends up taking advantage of the situation once again..!!?