Natsuko has been raising her son Taichi with a woman since she lost her husband in an accident. Her love for her husband was not cold, but her body was frustrated with it. At one point, Natsuko realizes that Taiichi has become similar to his late husband. And when I put it together with a naked taichi at the dressing room, I realized that even its chi-po is two halves, and finally became a forbidden action.