Younger Sister's Sweet Secrets

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.