The younger brother moves in with his older brother in Tokyo due to work. From the day his brother came home announcing his marriage, he begins living with his sister-in-law—the very woman he's secretly admired for years. Unlike his quiet older brother, the younger brother makes an effort to talk as much as possible. One day, the sister-in-law invites him, saying, "Let's have a drink together?" His heart races as he accepts her invitation. He feels as though the distance between them is closing, his emotions swelling with every moment. Her warmth and kindness stir his feelings deeper and deeper, drawing him irresistibly toward her.