My Girlfriend Cheated on Me With a Senior, so I'm Cheating on Her With His Girlfriend

Yuu Isshiki’s first year of university was supposed to be a time of new beginnings, but that promise crumbles when he uncovers the devastating truth: his girlfriend, Karen, has been carrying on a secret affair with his senior, Kamokura. Reeling from the shock of betrayal and drowning in humiliation, Yuu finds himself wandering the campus with a fractured sense of self. In his darkest moment, a desperate and reckless idea takes hold—if his own relationship can be shattered by infidelity, then retaliation through the same means feels like the only path forward. His target is Kamokura’s girlfriend, Touko, a woman renowned as the most beautiful student on campus. With little left to lose, Yuu approaches her with an audacious, raw plea: “Please have an affair with me.” What begins as a bitter scheme for revenge, however, swiftly evolves into something far more complicated. Touko, rather than rejecting him outright, becomes an unexpected accomplice in this high-stakes game of emotional warfare. As the two wounded parties enter into a calculated arrangement of mutual convenience, their clandestine meetings are charged with a volatile mix of tension, mischief, and lingering heartache. Every secret glance and stolen moment blurs the lines between their original vendetta and a burgeoning, genuine connection. In this thrilling romantic comedy, the greatest danger is no longer the threat of being discovered—but the very real possibility that their counterfeit affair might just turn into the realest thing either of them has ever felt.