@Cottonball83 hello so i read some spoilers from the novel and the explanation from that and i aslo believe it was metioned in the manhwa already tho they didn't give enough highlight to it is that it was klauds fault. He was so mad at aeroc when Raphael died so klaud gave aeroc medicine's that turned him into a omega and is able to have babies. That's why in the past life the one before this they had several children because klaud keep on doing it with aeroc resulting in them having these children. As for how he became a omega in this life which is the present life is i believe his traits which he had in the past life were with him so for short explaination the aeroc from the past life is the aeroc in the present life that is why he is still able to have his omega traits and his memories. here's a lil spoilerjustclickonthistextifuwannasee
Spoiler!
there is going to be a third life where it's klaud who remember and aeroc who can't remember their past life.
