Renji Okumura is your typical shy university student. He spends his days buried in books, playing games, and secretly admiring his crush, Aya Tomori, from afar. For five long years, he’s been too scared to talk to her. No friends. No girlfriend. Just him and his quiet world. But Renji has a secret.In his head, he’s been building an alter ego—a confident, smooth-talking playboy who says and does everything Renji never could. It’s harmless… But one night, at the Eve of the Blood moon, after slipping and hitting his head on the stairs, Renji wakes up to find that, miraculously his alter ego has taken over his body. Now he’s not the invisible boy anymore. He’s Takumi: A ladies’ man who knows all the right lines. The problem? Aya falls in love with Takumi, not knowing he’s actually Renji in disguise. What’s worse, Takumi—being reckless and unhinged—ends up having a one-night encounter with Aya, dragging Renji into a mess of guilt, secrets, and unintended consequences. Renji decides to confess the truth to Aya… but things spiral out of control when Aya, instead of running away, asks Renji to help her win over his own alter ego. Suddenly, Renji is stuck in a bizarre love triangle: Renji, the shy boy who loves Aya. Takumi, his alter ego who Aya has fallen for. Aya, who doesn’t realize they’re the same person. ... And just when Renji thinks things can’t get worse, Takumi himself seems to be developing feelings for Aya—independently, of Renji’s control.