Azusa Omori is a 37-year-old housewife who has spent her days supporting her hardworking husband and raising their son. The ordinary life of their family of three has, in fact, been an irreplaceable happiness for her. But recently, her son Tsutomu has been acting strangely. She tries to convince herself it's just the changes that come with adolescence, yet she can't shake the feeling that something is off. She senses his gaze lingering on her breasts, and her anxiety and confusion continue to grow. How will she confront this incident that threatens to shake the bonds of their family?