One day, cracks appeared in the sky. A mysterious energy came out of these cracks. Because of this energy, some people awakened strange abilities. Later, it was discovered that these cracks were portals leading to other worlds. In these worlds, there were infinite treasures, but they were also full of traps and deadly enemies. So, they began to call these worlds dungeons. Arinn is a girl with a large debt and, to pay it off, she and her friend Bolt entered a