Singirok

Sang, once the little boy too afraid to jump into the lake with the older children, comes back home a brave new man – a huntsman, to be exact. It's only after reuniting with his friend Se-Jin, the shaman’s daughter, that he notices a black shadow has been following him... The experience reminds him that there are spirits that walk amongst us, and not always in the dark.
(Source: Lezhin)
Note: The chapter count includes a prologue.