Saika and Akagi are dating, but since they work in the same department, they’re keeping their relationship a secret for now. Akagi is talented, kind, and always attentive to Saika. She dreams of the day they’ll live together. Their boss, Takeda, knows everything and has had his eye on Saika for a while. This business trip is the perfect chance for him to make his move. There are many bad rumors about Takeda, so Akagi is worried about Saika. However, having been Takeda’s assistant for a year, Saika trusts him. Then the day comes. During dinner with clients, she’s pressured to drink heavily and passes out. When she wakes up, she finds herself in a hotel room, with Takeda staying with her for the night. Her mind tells her to resist, but her body has no strength. Takeda’s forceful thrusts bring Saika to climax repeatedly, giving her pleasure she’s never known before. This sensation gradually consumes her mind, making her forget her devoted boyfriend and choose Takeda. After returning, Saika breaks up with Akagi. Even when they meet at work, she treats her former lover, who gave her his heart, like a stranger, as her mind and body now belong to her boss...