Arouse My Mother and I'll Fuck Yours. Rika Fujishita Sayoko Katagiri

僕の母親を抱かせてやるから、君の母さんをヤラせてくれ。 藤下梨花 片桐沙代子

Two mother-son pairs living in an apartment building, close neighbors and good friends. However, the sons vaguely wonder why their mothers get along so well. Then one day, they accidentally witness a shocking sight. The fact that their mothers are both being pounded by the sturdy liquor store guy who always comes by. And what plan do the two sons devise... Enjoy the unexpected twists and turns of the drama and the incestuous wife-swapping.