Mayu lives with her husband and her father-in-law, who is physically disabled and requires care. Mayu has a complex about her nipples, so she even hides what she does with her husband, and their relationship is becoming strained. Her father-in-law accidentally overhears their conversation and pretends to be an underwear thief, hiding Mayu's bra. From the next day, Mayu has to care for her father-in-law without a bra...