Synopsis
Seiji Aino's mundane existence gets turned upside down when a strange girl named Guri shows up at his front door, demanding a kiss within twenty-four hours or else he'll die. Mistaking her frantic plea for a romantic confession, Seiji kisses the stranger who barged into his home. But Guri is actually a cosplaying Cupid armed with a Kiss Note—a tool that forces any pair of names written in it to become a couple. She confesses she accidentally wrote Seiji's name while indulging in yaoi fantasies, making their kiss meaningless. Matters escalate when Guri reveals that if Seiji isn't paired with someone soon, she'll die and he'll remain a virgin forever. To save himself, Seiji targets popular Akane Hiyama, but she reacts with psychotic obsession upon learning about his kiss with Guri, attacking them both. In the chaos, Guri uses the Kiss Note to pair Seiji with Akane, stopping the assault. Yet, driven by her own budding feelings, Guri also pairs herself with the duo. This bizarre coupling turns Seiji and Akane into temporary angels, forcing them to help Guri matchmake humans or face eternal damnation in hell. Stripped of all normalcy, Seiji must now assist these eccentric girls in their matchmaking duties.