Sakura lives a comfortable life with her easygoing husband, but she has one major grievance: cohabiting with her father-in-law. When her husband is away and Sakura falls asleep, the father-in-law takes advantage of the situation, sliding aside her underwear to greedily devour her sex, savoring the mix of sweat and womanly scent. Enthralled by her taste, he begins raping her daily, using her however he pleases and turning her into his personal sex slave. How will Sakura confront this disturbing new reality?