A cosmic anomaly has opened interdimensional breaches on Earth, creating exotic hybrid environments called “dungeons” inhabited by deadly otherworldly creatures. Yoo Jaryong, left to fend for himself as his father’s health deteriorates, secretly cultivates the superhuman potential arising from the anomaly and becomes a dungeon smuggler to pay his bills. When elite dungeon raiders discover his skills, he is given the chance to train at the alma mater of the world’s heroes: Yongsa High School. (Source: Tapas)

Min-Jun Kim, an ordinary high school senior in Korea, was suddenly summoned to another world, where he became a dark mage. Determined to return home, he overcame all sorts of hardships and saved the other world with black magic before leaving all his wealth and glory as a hero behind to return to Earth. However, before he could fully enjoy his life, a problem arose. A dungeon break had occurred and monsters came pouring out, threatening his comfortable days. Therefore, Min-Jun, who had just returned to earth, had no choice but to… enlist on the very next day!!! (Source: Naver, translated)