Kasumi Shirakawa, a housewife celebrating 15 years of marriage. Initially a shotgun wedding, she has spent her days busily raising children and supporting her husband's income. However, as her children began attending school, she gradually found more personal time and started enjoying outings with friends, such as dining and shopping. Despite this, she feels emotionally neglected by her husband and longs for recognition as a woman, growing increasingly lonely. Craving more than what friendships offer, she turns to a dating app, leading her into secret affairs with complete strangers.