Kanako fails all subjects, and she gets imprisoned in a time cage for a week, but for her is a year. When she returns, she discovers all the fads that have started during the time she was imprisoned.

Miki, Kanako's little sister, visits Ame no Kisaki. She met Mariya when she was in elementary school, and has been in love with her since then. She wants to date Mariya when she enters high school, but Kanako tells her she's a boy. Despite this, Miki promises to enter Ame no Kisaki when she's older and to date Mariya.