Imugi-wa Namukkun

Yeong-Do, a poor woodcutter living alone who longs for a family. And Imugi, who must kill its companion to become a dragon. Yeong-Do hears a rumor that if he throws an axe into a mountain pond, the mountain spirit will turn it into a golden one. He throws his axe to prepare for his wedding. But what emerged from the pond was Imugi, enraged beyond measure by the humans who kept hurling axes at it. Imugi, intent on killing the human before it, becomes drawn to the scent emanating from Yeong-Do and gradually fixates on him...

(Source: Lezhin, translated)