A girl named Mitsuki Kanzaki lives with her step-brother Yuya after her mother remarries. One day, Mitsuki is possessed by the self-proclaimed spirit of a young girl, Hiyori Kotobuki. Hiyori (in Mitsuki's body) must fall in love with Yuya to move toward the "Gates of Heaven."
Sakamichi Onada is a wimpy high school freshman who loves anime. He initially wants to enter the anime club, but winds up joining the cycling club after meeting two classmates who are already famous cyclists. He undertakes the grueling training to compete in races, and discovers his own hidden talent in cycling.