Ever since he was a kid, Garreth wanted to be a Hero. He graduated from the Fighter's College with top marks, but was never chosen to be Blessed with magic, leaving his only career choice that of an ordinary mercenary. He takes jobs aiding the heroes instead, hoping to one day prove himself worthy of becoming one, until he finds himself abandoned by his clients and bleeding out at the bottom of a dungeon.Then, a low-ranking demon in a similar position makes a proposal. If Garreth lets the demon possess him, it will save both their lives, but can never be undone.Garreth agrees. A whole new world is opened up to him as he suddenly has access to the System that the demon uses to see the world, as well as all of its Skills.With this new partnership, the two have one singular goal:Get revenge on those who thought them expendable. [Story is split into episodes. Updates daily until the episode is complete, with short hiatuses between episodes. This unconventional upload schedule leads to better quality, I promise.]