Aino Seiji is your typical male high school student when he meets Guri, who is a shinigami? No, a pervert--no! An angel?! Guri introduces him to the Kiss Note and explains that if he doesn't kiss someone within 24 hours, she will die. So it's off to Seiji's school to find his school crush, his classmate, Hiyama Akane, but of course nothing is ever so simple...
So it's true that a girl's sexual desire 
increases after a certain age?
Der Sexualtrieb von Mädels mag zwar
ab einem bestimmten Alter explodieren,
Cuando se llega a cierta edad,
¿aumenta el deseo sexual?
Cuando se llega a cierta edad,
¿aumenta el deseo sexual?
Les filles sont précoces de nos jours,
mais quand même…
Quindi è vero che il desiderio sessuale
di una ragazza aumenta con l'età?!
Então é verdade que a libido das 
meninas aumenta depois de certa idade?
Значит, правда, что с возрастом
у девочек растёт влечение?