I'm confused on the last story ┗( T﹏T )┛

well the young boy is olg who knows how many great grand child blood line curse and the young beast just found a new friend hopeful mate in him but mangaka added because he can one of them deals

I couldn't really understand what Avalon meant, but basically I believe that, that kid with the "birthmark/gods curse" is the descendent of Olg when he had a wife way back when. I'm assuming that due to the curse mark, Olg found him and is staying with him atm, and this two "fallen pups" were from the black beasts old pack who missed Olg...yup that's it
(ﾟ3ﾟ)～♪

SOOO is olg human now? like grow old and die human? thats what got me confused

yep and with a bloodline curse to boot

Aww man thats pretty sad cuz doesnt that mean he just found someone to love that could live as long as him and now he's human so he's the one dying!! ╥﹏╥ im gunna go cry in a corner now.

yeah it's sad especially since the beast only choose one being to love in their lifetime he might follow him die along with him ╥﹏╥