A remarried couple in their 40s, Eri and her husband, had been living a peaceful life. But one day, everything changed when she refused his request for sex just once. After that, coldness spread between them, filling their home with tension. Meanwhile, Minoru, the husband's son from a previous marriage, harbored intense romantic feelings for his stepmother Eri. Sensing the growing distance between his father and Eri, his emotions deepen even further. How will Minoru's hidden desires unfold from here?