Japanese schoolgirl Kana Shimizu is more than a little shocked to find herself transported to a different world on her fifteenth birthday. She has been summoned to be the hero who will defeat a demon lord, just like in the manga. Except that she's the wrong hero for the job and they can't send her home.

Kana is stuck in a fantasy world where she doesn't even speak the language and she's no use to anyone. Her only consolation is that nothing like this ever happens in reality. She has to be dreaming. Now, if only she could figure out how to wake up...