Back with the recs:

The Demigod Chronicles: Untold Tales from the Underworld
-By LadyWinter

Tags: hunhan taoris baekyeol kaisoo xiuchen sulay nubci4

Description

Demigods, the bastard children nobody wants. The mix breeds that belong neither to the mortal world nor immortal world. Thrown into the Underworld, they banded together and made their own family. In this collection of short stories, witness their struggles, laughs and tears as they search for their identities and find ther place in the universe.

My note

I love this fic. (or these fics? it's a bunch of short stories) And I know that the whole "Greek mythologies" theme can be easily bad, this one nales it! It's a spin-off story from another fic that's been re-written atm. Still, you can read this as it work as a prologue of sorts. 
Definitely worth the time spent reading it! 

(This -and the main fic- is one of my personal favorite fics out there tbh)