Timid Stepdaughter Targeted by Shut-In Obsessed with Her Bust

Kareki Tsunetaka, a shut-in posing as a security officer, lives with his father and the narrator, who brought her daughters, Sayaka and Yuki, after remarrying. Displeased with the new family, Tsunetaka targets Yuki, who is self-conscious about her bust size. One day, he stares menacingly at her, triggering the narrator’s unease and a sense of déjà vu as she reflects on past decisions that might have changed their fate.