His mother Shizuka, who was of marriageable age, got a stepfather. Genji did not think well of Susumu's presence, and the family was strained. For Susumu, who endured Genji's sarcastic remarks even during meals, the only thing that saved him was Shizuka's presence. Susumu and Shizuka had a deep relationship before... However, with Genji's arrival, he could no longer be openly dependent on his mother, and with his desires growing, he began to desire his mother's body while pretending to be calm as the three of them huddled around the kotatsu to keep warm...