A married woman working on the side as a delivery health girl, Reno arrives at a client's home as usual—only to discover something is off. Her customer turns out to be her former homeroom teacher from her school days, who once made advances toward her. After completing the service and preparing to leave, the man shocks her with a sudden remark: "Wow, you've grown so beautiful, Kiyomi-kun." With her secret now exposed, Reno falls completely into his grasp. Holding this leverage over her, the man begins summoning her weekly, gradually tightening his psychological control over her mind.