User blog comment:Venithil/Venithil's Monmusu Productions and Ideas/@comment-24006918-20140126063807/@comment-4991168-20140126123600

If you mean how to develop the original story in a way that allows for a proper ending for either of them, it's hard to see what's a good branching off point.

Unless we follow that one where Erubetie age-reverses an already powerful Luka and instead raises him to be her sex toy; that could include also being a champion for the monsters so he helps out with the Illias War after growing up.