Ryo Tachibana plays a quiet, ordinary mother whose peaceful daily life takes a turn when she notices her underwear keeps going missing. She soon realizes her son has been stealing them. Discovering this, she becomes aware that he sees her as a woman, stirring unexpected warmth deep within her chest. On lonely nights, masturbation no longer satisfies her, and when her son finally makes a move, she's unable to resist her overwhelming desires. This film explores her inner turmoil and forbidden longing.