In a world where dungeons and monsters appear, Kang Ha-Jin dies in the last dungeon due to the betrayal of colleagues. At that moment, for some reason, Kang Ha-Jin returned to the past. The story of Kang Ha-Jin to make a result different from the past and to get revenge. I really like the novel and i saw it wasnt here so i just put it here it is not an original chech the real one out for yourself here: https://mtlnation.com/novel/return-to-level-up/