Hoshizora no Kimi

The main character, Kouto Kaji, is a high school boy who is an otaku at heart. In the room where Kouto lives alone, his childhood friend Chika Hoshizaki, who is also a beautiful girl in class, suddenly moves in. ......!　However, there is a reason for that--.

Suddenly, Chika's body floats in the air and she can't get back down, so she asks Kouto for help. Chika has taken up residence on the ceiling of Kouto's room. A life together, full of secrets, is about to begin. ......!

Will Chika be able to get out of the numerous dilemmas that await her and return to her former, unflappable self?