Kyoshiro to Towa no Sora

A high school girl named Kuu Shiratori lives in Academia, a massive city representing humanity's recovery ten years after a major disaster. Kuu enjoys her daily life and often dreams about a prince who invites her to leave with him. During preparations for the school festival, the prince from her dreams, Kyoshiro Ayanokoji, appears in real life and repeats his request for her to go with him.