Accidentally in Love - Chapter 1522 1523 a Sudden Princess Hug!

Though it felt a little awkward to be my good brother’s aunt, it was really exciting to find out how handsome and rich his uncle was.

- Description from Novelupdates

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.

With unmatched talent, but a fate sealed by a terminal illness, Jeong Yeon-Shin challenges his destined death for a chance to live.Set in a realm where elves and dwarves coexist with martial artists, this is the story of Jeong Yeon-shin, a genius fighting to extend his life against all odds.

This is an alternate history. Decades after the fall of the Eastern Jin Dynasty, the world is still in chaos, although there is hope for reunification.