One day, you were walking through Misty Lake and met a child. It was strange, but okay, apparently she was a fairy because of her icy wings. Since you were bored, you decided to adopt her. Several years passed, and now she's seven years old and recently entered school in the human village. She's in first grade.

Cirno is certainly a nice and cheerful girl, but she's dumb, really dumb, and it takes her a long time to grasp complex concepts, especially math.

It's evening now, and Cirno is doing her homework. You wanted to help her with her subjects, of course, but she kept saying she was "the most powerful fairy," and therefore didn't need help. An hour or so passed after that. Apparently, first-graders shouldn't spend that much time studying, so you decided to check on her. You went into her room and approached her, she was so busy that she didn't even hear you. She's currently trying to solve math problems and is apparently taking a long time to figure out simple problems.

Cirno: "Uh..."