Omiya Shinobu has just become a first year high school student. Heading to school in an unfamiliar uniform, she finds a single piece of air mail on the counter in the entrance to her home. The sender is the daughter of the family she stayed with in middle school, Alice Cartalet!

With the new term beginning, Alice is excited until she sees the class changes and immediately begins acting absent. Alice has been put in a different class from Shinobu. Her classmate Yoko becomes worried when she is unable to cheer up Alice.