Overview Jeong-gook, who runs a private business, only looks at his step son after he got hurt. Seong-sil came as a tutor when Jong-soo became a student. Jong-soo, who had no step mother, follows Seong-sil as a teacher, step sister, and step mother. Jeong-gook, who watched this, gradually grows in love with Seong-sil, and the two start a family based on marriage. Jong-soo has already loved Seong-sil as a woman, not a teacher.