Beyond the Door

C-class Esper Kim Dae-moon possesses a special ability to connect space to space, but due to his low rank, he is treated as a half-baked failure. In a life that was little more than being a slave to the Association, there were people who reached out to him… S-class Guide Lee Geon and his older sister, A-class Guide Lee Ji-eon. However, Lee Ji-eon dies after being caught in an overpool caused by a dungeon burst, and Lee Geon, his sole remaining savior, faces the risk of death in another overpool. Amidst the crisis where everyone is on the verge of annihilation, Kim Dae-moon barely manages to rescue Lee Geon and his partner, but at the cost of facing death himself. Yet, in that desperate mome...