If you're looking for manga similar to The Eldest Brother of Baekdu, you might like these titles.
When Cheongmyeong of the Mount Hua Sect awakens a hundred years in the future, his last memories are of a bloody battle against the Leader of the Demonic Cult, the evil Cheonma. The battle almost saw the end of the Ten Great Sects of ancient China, when Cheongmyeong ended the hard-fought struggle by striking down Cheonma. Soon after, he succumbed to his wounds, filled with regret at their pyrrhic victory. All is not lost, however, as he awakens to his second chance at life. Shocked to find his beloved Mount Hua Sect reduced to a mere shadow of itself in the present day, Cheongmyeong embarks on a journey to restore Mount Hua to its former glory.
A mysterious hole appears during a beta test of a VRMMORPG game and forced me into the position as one of the grandsons of the holy emperor. Except I am also a necromancer...
Jinho and Chundo are two best friends wasting their summer days away. But when they find a lottery ticket on the street by chance, they're thrown into a mysterious treasure hunt with two strange girls they don't fully understand.
The tyrannical dragon has been defeated and the continent is ushered into an era of peace. But the Hero has a long road ahead of him to find peace within himself... The second chapter of the Hero's story is set in a peaceful land. Let the fantasy detective tale begin!