Mother Hisayo is elegant and passionate about pottery, attending a local ceramics class every week to craft her ideal pieces. Her family life appears peaceful, and her son Masahiro lives comfortably. One day, when Hisayo is late returning home, Masahiro goes to pick her up at the pottery studio—only to discover his mother covered in clay, laughing and chatting intimately with a young man as if in a scene from a movie. Confused and shocked, Masahiro returns home with her, where she acts as kind and gentle as ever. Yet doubt begins to stir in his heart, launching him on a journey to uncover the true nature of his mother's hidden desires.