Nanami Shiina plays a cute coworker. In order to deceive her parents at home, she becomes his "boyfriend for a day" and his reward is a passionate service from her. Amidst the tension of pretending to be his boyfriend, he secretly performs a blowjob out of sight of others. Her hot breath and her obsession with his cock as promised. Their false relationship is transformed into true affection through intense thrusting. As she gazes at him with her moist eyes, she moans, "I'm really falling in love..." at the moment he allows her to cum inside him. This bittersweet, one-day lover's experience gives him exclusive access to her weaknesses and lustful nature, which she never shows at work.