Matsushiro Kouta has a crush on a pretty but somewhat cold classmate. Sasara, the self-proclaimed angel, appears with the sole purpose of helping him, but her love magic—which activates after counting down from 10 to 0 using specific methods—brings a lot of trouble to the protagonist's life. Also, he knows little about his cute childhood friend's feelings and that Sasara is not the only angel out there... Included one-shot: Volume 6: Countrouble (pilot)