A story of a modest young wife drawn into pleasure. Mayu, a married woman dissatisfied with her relationship, burdened by the exhaustion of raising children and longing for new emotions, meets a man by chance—and her life changes forever. Yielding to a relationship with someone other than her husband for the first time since marriage, she returns home still craving fulfillment, both mentally and physically. One impulsive act leads to the beginning of a new romance, guiding her toward an unknown path she's never walked before.