The Ruined World Was Mistaken for a Game

Synopsis

Game director Kim Jin-woo is summoned to Arsilan, a magical realm nearing collapse under attacks from destructive beings known as Erosions. Reborn as the archmage Arsilan, he discovers that his Earthly origin grants him immunity, but the scale of the crisis overwhelms any lone defender. After awakening the power to cross worlds, he recruits people from Earth and disguises the rescue effort as a fantasy game, sending them into Arsilan to battle the spreading threat.