After divorcing shortly following her son's birth, Iroha Narimiya raised him single-handedly, cherishing him as her most precious treasure. However, she recently noticed that her son, now entering adolescence, has begun to distance himself, making their bond grow weaker. One day, she learns from her disheartened son that classmates mocked him at school, calling it "creepy" that he still sleeps with his mom. Overcome by anxiety and fear upon realizing her son is starting to pull away, Iroha grows desperate. Worried he'll drift further from her, she slips into his room late that night wearing only a sheer negligee. In that moment, a mother's deepest emotions come rushing to the surface.