A Goddess' Path

Hi guys! So this is my very first fanfiction. Well, at least I think that it's a fanfiction. I say this because this story is about some characters I made myself, so... yeah...
Please tell me what you think about the characters and my ideas!

Alias and Lilac Tremegata had a perfect life. They were homeschooled by their loving parents, had a huge house and, best of all, they had plenty of time for fun and games! They lived happily with their mother and father.

Until it came...

What will happen to these two girls when they get an unexpected visit from a vengeful demon? Why did he come to them?