Yurika Koizumi, a married woman, usually prefers light clothing and routinely greets delivery men wearing sheer lingerie. Her son, though feeling uneasy about her behavior, never voices his concerns. One day, while helping with laundry in the backyard, he catches her hand-washing his underwear. Deeply moved by the tender moment, he impulsively makes love to her right there. A story revealing the warmth and pure emotions hidden within everyday life.