Ordinary high schooler Seiji Aino has his life upended when a clumsy cupid named Guri appears wielding a Kiss Note — a notebook that forces any two people whose names are written together to fall in love the moment they kiss. Guri accidentally scribbles down Seiji's name, and unless he kisses someone soon, she'll vanish. Dragged into Guri's botched matchmaking, Seiji is pulled toward the violently devoted Akane Hiyama and a growing circle of girls tangled up in the Note's chaos.