Ha Jae, who’s contemplating death on the rooftop due to bullying. A senior appears before him and suddenly pushes Ha-Jae off?! But, he wakes up safely in the Nurse’s Office in school. Ha-Jae’s retaliation against the bullying that the delinquents have started again ends in failure…But, Siwoon appears before him yet again and coaches Ha-Jae to defeat the delinquents in one strike using his fist.The presence of the Murim appears hidden under what seems to be an ordinary school, and the perilous adventure to the world of Murim begins.

The great warrior Leon Manas, son of the legendary Nathan Manas, now carries the powerful sword Brumhart. Though this blade is coveted by many, only the heirs to the House of Manas can wield it. But that doesn’t stop the sinister from trying. Ernan, once trusted knight of the House of Manas, murders his commander, robs him of Brumhart and orders the death of Leon’s only son, Zian. But the men sent to perform this infanticide come up against a mysterious figure in a dark cloak who defeats them only to disappear with the child into the thick of the Tass Forest. Sixteen years later, Ernan has become a feared tyrant, but still has not been able to unsheathe Brumhart. Thus begins the tale of this desperate king and the young boy who would become one.Note: This Manhwa is based on the MMORPG

"Please send me back to the past." If he cannot not kill that person in this era, he just needs to go back to the past. The man used the "Great Regression Technique" to cross time, going back to the past he desired so much. The "Unrivaled Swordsman" who had lost everything, his family, friends, and life. This is his first step to taking his revenge.