"How about making a promise to abstain from sex for three weeks?" When her husband proposes this, Riho Fujimori agrees, wanting to fulfill her beloved's wish. However, after several days, the ache between her legs intensifies, and when she pleads with her husband for intimacy, he rejects her. Pushed to her limit, Riho suddenly feels an overwhelming temptation toward her live-in father-in-law. Breaking the three-week vow, she attacks him while he's bathing... Having shattered her abstinence, she plunges into a new relationship. A full-scale reverse NTR drama begins here.