Boyfriend's first visit to his newly started girlfriend's room. In a room filled with her scent, he pretends it's his first time here, though her cheeks are slightly flushed. An odd couple—an athletic gym instructor and her chubby boyfriend. A slimming program begins in her room, but quickly shifts as he shows different interests, initiating kisses and pushing her down into sex. From there, the weight loss routine turns into pure pleasure: masturbating with konjac, mischievously restraining him with rubber tubes, having sex wrapped tightly in plastic wrap—the workout becomes entirely erotic. As their bond deepens, her room transforms into a stage for new, intimate experiences.