Long long ago, there was a little girl who accidentally walked into the Moonlight Forest. Moonlight Forest is a place where you can never come out again. It is always dark and filled with moonlight. You can imagine how beautiful it is, but there is a price to pay for living in such a place. That is, those who enter the Moonlight Forest will never be able to find their way home, and they will always have to sign a black contract with the hunter.