Dokkaebi Nanggunnim

When she was young, Heo Yeon-Ri accidentally released the seal of the Goblin King Mu-Jin, who was asleep. In return, Mu-Jin protects Yeon-Ri and her family and tries to find a way to return to the world of ghosts, but Yeon-Ri always dreams of falling in love with Mu-Jin. Then one day, Yeon-Ri learns that she is a half-human, half-demon who has the ability to materialize drawings. Mu-Jin tries to put Yeon-Ri's demonic energy to sleep in order to protect her from the world. However, Mu-Jin's power, weakened by his long absence from the world of ghosts, isn't enough... A man named Baek-Woon appears at that moment and offers to help Yeon-Ri. Yeon-Ri is forced to stand between Mu-Jin, whom she has always loved, and Baek-Woon, who has newly approached her. Yeon-Ri's journey to not let go of both her abilities and love begins!

(Source: Peanutoon, translated)