Toshiya, an aspiring screenwriter, notices a woman who appears to be a married woman in the apartment building across the street from his apartment window. Intrigued by the somewhat melancholic Ayumi, Toshiya, despite having a girlfriend, begins secretly peeking into Ayumi's room. One day, while peeking into her room, he sees Ayumi straddling her husband, who is inside, and beginning to desire him. It's as if she's deliberately showing off to Toshiya…