Goblin’s Night Manhwa

“The complex of the boy, Choi Si-woo, is being overweight.
Choi Si-woo runs and runs around his house until past midnight, and he encounters an old man on a walking trail. In the blink of an eye, the old man covers Choi Si-woo with the straw backpack he is carrying.
W Choi Si-woo had stumbled upon was an enormously wide ruined traditional Korean house (hanok).
At the edge of the spacious courtyard, surrounding him on the courtyard, t were numerous black shadows standing.
To the bewildered Choi Si-woo, the old man speaks. Once every 666 years, a ceremony is held to select the king of Yokai and each Yokai in this world possesses one entry ticket for it.
And Choi Si-woo is, in fact, a hybrid of a human and a goblin, inheriting the blood of an extinct goblin. Among the goblin folk, only Choi Si-woo possesses the entry ticket.
As the sole survivor inheriting the blood of a goblin, the adventure of the half-monster boy, Choi Si-woo, begins.”

도깨비의 밤, Night of the goblin, Night of the Ogre, Dokkaebi’s Night, Night of Goblins