Three Conditions For Being Secret Housemates!

Starting tomorrow, Hina Kawahara will be a high school student! She decides to move to the big city and go to high school while living alone in order to learn more about her potential... but when she gets to the apartment where she's supposed to live, she sees her childhood friend, Ao!! At first, she thinks he's just there to help her unpack, but he seems confused... when Hina asks her mother, she finds out that she'll be living together with Ao instead!! Ao is like an older brother to her, but he's also her first love... How is she supposed to face him from now on?