I'll Become the Villain

Lucas Ford was a twenty years old guy who live in a world where dungeon, level, and monsters exist. He was accepted on the hero party group but one day Lucas who was bloody wounded was betrayed by his team and was left on the dungeon to be a sacrifise or a pawn for the monsters while they escape. Later on he woke up with a surprise that he's alive and his wounds are all healed. Pure and anger flow in Lucas heart as he vowed to destroy the hero team and become the true villain of the world.