Heavenly Demon Instructor

When the catastrophic event known as "Portal Impact" shatters the earth, Park Hyunsoo loses his parents and is left with only an unconscious younger sibling to protect. Relegated to a powerless support role, he struggles against constant contempt and overwhelming despair. Just as all hope seems lost, a legendary martial arts master named Chungyeong mysteriously crosses time and space from Murim to offer him guidance. Now, under the rigorous and unorthodox tutelage of this formidable master, Hyunsoo begins his fierce journey to master the martial arts and fight for his family's survival.