After losing her younger brother and discovering that he also ran off with someone else's money, Maki Koizumi is devastated and says she will do anything she can to help. A debt collector tests that promise by making her strip, kneel, and wear a collar. She obeys his order to masturbate with a vibrator, then gives him a blowjob and titjob. Soon Maki mounts him herself, bouncing her hips and huge H-cup tits as she cums repeatedly before accepting his creampie.