Manga by author Park Sung Woo

Mrchen is a young man who was saved from the brink of death by a martial arts master by infusing her Ki into him. However, things take a turn when Mrchen has no interest in fighting and aims to live a peaceful life. His "Master" then decides to make use of his ability to become stronger simply by reading tales and absorbing the techniques used in them. She introduces a huge library, filled with all kinds of books that record different forms of martial arts and techniques, to him. Mrchen picks up a book and begins to read...

From Anime News NetworkIn Korea in 668 AD North Star, using the martial arts discipline of Sashinmu, went into a beserker rage and massacred 100 of the most skilled martial artists of his time. After the massacre North Star and the lethal art of Sashinmu disappeared. Now it is 20 years later and a text of Shashinmu has surfaced again and a mysterious cadre will do anything to gets its hand on it and learn the deadly art. Meanwhile it is up to the books protectors, Rin Yhun and Bi-ryu, to destroy it before the forces of evil get their hands on it. But should the secrets of Sashinmu be destroyed forever or should rather the art be mastered and used by the books protectors?[Sequel to ChunRangYulJun]

A series of events after the mysterious alien weapon "yuanling" fell to earth.