Magink is a Chinese RPG game. (Translated from Google translate) it is about a world where chaos is created by the existence of monster, and the responsibility to seal the chaos fall upon The Sima family that inherited the power of Ink Surgery.
However, because of the power itself the protagonist uncle fell into a state of chaos and the seal that protect the world was released. So the protagonist will need to embarked on a journey to seal the chaos and save the world again. (This might not be accurate description)