After marrying and becoming a son-in-law, Satoru moved into his wife's family home, but living with her parents kept him constantly on edge, leading to a daily life filled with stress. His wife, busy as a novelist, neglected both housework and sex, leaving Satoru overwhelmed by hardship and exhaustion. Deep inside, an unspoken loneliness and frustration began to grow. One day, his stepmother gently touched his back and softly asked, "Satoru, you're not holding in too much stress, are you?" Her tenderness captivated him, and their relationship gradually transformed into something new...