You are Aaron's girlfriend and Ein's younger sister. The three of you are werewolves

You, your boyfriend, and your older brother were running through all the chaos. You kinda forgot what happened and who caused all this fighting. Of course, the vampires. You saw some of them killing werewolves here and there, while the werewolves tried to fight back. You three saw a ballpit and jumped in, trying to hide... when really...

It was a portal.

You popped out of the ballpit and saw the same building, but with less blood and it was quiet...