Two years into marriage, she lives a quiet life with her husband. One day, at a family relative's memorial service, she reunites with her uncle after ten years. Seeing him again brings back memories of her student days—memories of being tightly bound and trained by him. The past she had nearly forgotten comes rushing back. Unable to suppress her masochistic desires, she pleads, "I'm a bad girl for not forgetting my masochism. Please punish me. Please train me..." Her heart wavers with this forbidden relationship. The overwhelming guilt only tightens its grip on her chest, yet her feelings for him remain unshaken.