Mayu lives with her husband and her father-in-law, who is physically handicapped and needs nursing care. Mayu, who has a complex about her own nipples, hides even the night activities with her husband, and her marital relationship is becoming worse. Her father-in-law, who happened to overhear the conversation, pretends to be an underwear thief and hides her cocoon bra. And from the next day, Mayu will take care of her father-in-law without a bra.
