“Wow, your girlfriend's so strict~” A devilish smile and calculated sweetness. Moé, a college girl who secretly enjoys targeting ‘guys with girlfriends’ with her calculated charm. One night at a club drinking party. As usual, Moé casually closes the distance to her senior, who has a semi-live-in girlfriend and whispers in his ear. “Just for a little while... wanna slip away together...?” The moment they reach the hotel, her senior devours her body with hunger. “Hehe... Men really are so simple.” Immersed in a sense of superiority, she intended to enjoy it lightly. But their physical compatibility exceeded her expectations and what was supposed to be a ‘playful’ act sends her over the edge multiple times. Since then, she's become completely hooked on cheating sex with her senior. Every time they meet in secret, they give in to their desires without restraint, wherever they are. One day, while living this daily life, she stumbled upon a photo of the senior and his girlfriend looking happy together. Gradually, a different kind of feeling began to stir within Moé's heart...