Kuroki, a new mid-career hire, harbored intense sexual desires for his coworker Yukine. His obsession grew stronger each day until he could no longer restrain himself. Determined to make Yukine his own, he obtained a chastity belt and sneaked into her bedroom while she slept. He began executing his plan to completely dominate her body. The quiet night echoes with her breathing and her defenseless form, heightening the story's tension.