Mother, why is he the one who fills the loneliness? I took my son, Kazuya, and married into my remarried partner's house. Since this marriage was a second marriage, Kazuya's second husband also had a son, Tomoyuki, who was one year older than Kazuya. My husband, who owns a large mansion, was often away from home as he traveled overseas for work. My secret that has been made in such a life! I am tormented by guilt, but I satisfy my unbearable desires with sexual intercourse with my son-in-law...