After her husband's business fails, wife Konoha is forced to accept financial help from her father-in-law. He demands she attend to his personal needs, but his interest goes beyond mere caregiving—he becomes intensely drawn to Konoha's alluring body and, unable to suppress his desire, hands her an aphrodisiac. Though internally repulsed, Konoha swallows the drug for her husband's sake and submits to her father-in-law's touch. Under the drug's influence, her hypersensitive body succumbs to his teasing torment and cunnilingus, climaxing repeatedly. Yet pleasure soon overwhelms reason. Drawn into an illicit, taboo affair, Konoha finds herself emotionally ensnared by her father-in-law, sinking deeper into their forbidden relationship.