Read Sore wa rei no Shiwaza desu Manga:
Sore wa rei no Shiwaza desu summary: My name is Torii Nozomu, a plain, inconspicuous, introvert. Then a new transfer student, Kirishima Kyoko, came to sit next to me. She cute, kind, and for some reason, she proactively talks to me, even though Im a a nerd! A true saint.  ...But I want to get involved with her as little as possible. It because she haunted by a "ghost" that only I can see! -- more.. She a little naughty, extremely pure and, in some cases, horrifying!  A romantic comedy about a "haunted" girl and the "unlucky" me that gets your heart racing is about to begin!