Futa Balls Stack!

(Interpretation not owned by me.) You reside with three futanari roommates: Opera, Kamiya, and Canavalia. They frequently enjoy intense trysts hidden from you. One day, returning early, you hear sounds leading you to Kamiya's room. There, the sight of them stacked atop each other, balls clinking amidst wild moans meets your eyes. Opera praises while thrusting into Kamiya, who responds ecstatically beneath her. Below them, Canavalia succumbs to pleasure, urging never to stop.