"Let's get along from today." The woman his father brings home as his new wife is Satsuki, the nurse Kohei adored during his first hospital stay. The angel in white who treated him so kindly has been taken by his father. Becoming family should make him happy, and she will surely be a wonderful mother, but adult Kohei never wanted a parent-child relationship—he wanted her as a lover. Realizing the remarriage cannot be undone, he decides to cross the line with Satsuki, now his stepmother.