My name is Torii Nozomu, a plain introvert. Suddenly a new transfer student, Kirishima Kyoko, sits next to me. She's cute, kind, and for some reason she proactively talks to me, even though I'm a nerd! A true saint. Yet I want to get involved with her as little as possible because she's haunted by a "ghost" that only I can see! She's a little naughty, extremely pure and, in some cases, horrifying! Will I ever find a way to handle her?