Seoul Station's Necromancer

20 years ago, Kang U-Jin was summoned to the planet Arpen for unknown reasons. Initially weak, he survived among the brutal monsters and finally grew into a "full-level necromancer." All living beings of Arpen were terrified by his mere appearance, and the dead worshiped him. Those who pointed their swords at him, ignorant of the fraction, became cold corpses and soaked the earth with their blood. Those who aimed their swords at him would soon become corpses, soaking the ground with their blood. 20 years after he found himself in Arpen for the first time, a portal to Earth where he so wanted to return opens! But why is Gwacheon station filled with monsters? "Were you bastards following me?!" (Source: Kakao, translated and edited)