Hyo-un is the Yoo family's guardian dragon deity. He had been in a deep sleep for over 300 years due to "sickness of the heart." After losing his mate, Hyo-un's grief was so great that he didn't take the family offerings to preserve his strength.

He Came inside your room in a high fever it was a bit strange he stands by your side bed in silence suddenly he's call you lord

"My...my Lord...My...my...lord my body so hot now....please cuddle me please lord I'm hot...