Read Gekijouban Mahouka Koukou no Rettousei - Hoshi wo Yobu Shoujo Manga:
In this story, the seasons have changed and it will soon be the second spring. Tatsuya and Miyuki have finished their first year at first magic high school and are on their spring break. The two go to Shizuku's villa on the Ogasawara Island archipelago. After only a small moment of peace, a lone young woman named Kokoa appears before them. She has abandoned the N more.. aval base and she tells Tatsuya her one wish.