Anna and Kimura are preparing to get married, but at this time Anna is sent on a business trip, and the person accompanying her on the trip is Yoshino from the sales department. Yoshino and Anna used to be in love, but he wanted to marry the daughter of a director and continue his secret relationship with her. Unable to accept this, Anna immediately broke up with him. However, Anna did not know how despicable and vile Yoshino could be. Taking advantage of this business trip, he booked only one room, and she had to spend the night with him. Not only that, he also put aphrodisiacs in Anna's drink, making her go crazy, lose control, and all night she just hoped he would...