kasumi shirakawa, a beautiful model wife, lies to her family about traveling with friends and arrives at an onsen for filming. from morning till night, she enjoys sex with no other purpose than pleasure. she experiences open-air bath humiliation, 4p orgies, and continuous creampie orgasms. kasumi shirakawa indulges in sex more boldly and lewdly than ever before, satisfying her masochistic desires as she is fucked like a bitch in her final affair.