While her husband is away for work, Yuu Kawakami's son has become a reclusive, refusing to go to school. One morning, as she is about to leave for work as usual, she realizes she forgot to tell him something and rushes back home—only to discover him masturbating while tightly gripping her pantyhose. The reason for his withdrawal stems from being mocked by classmates for his leg fetish. Seeking to understand his feelings, Yuu gently begins to respond to his requests, and their relationship slowly starts to change. Through this process, the hidden emotions within her son and the warmth he truly longs for gradually come to light.