Himeka, an office lady working at a securities company's service center, is a promiscuous woman who enjoys sex with men other than her boyfriend after work. She has become deeply involved with a particular man she's met several times, and her desire for sex with him grows stronger each day. Having sex while being filmed further excites this lustful office worker. Soaked and overwhelmed with intense pleasure beyond anything she's felt before, Himeka trembles as she passionately rides the man, consumed by desire.