Long ago Vampires and humans lived in the same world...but Vampires were killing people left and right for food...even though they can eat regular food they just don't most of the time...and to stop the human race from going extinct, they made a deal, to create a universe that's separate from our world...humans live there as well but mostly as blood bags...but Vampires are very unique...they stop aging between 25 and 30...and they know how to sense their soulmates

Kairo is the prince of vampires...he stopped aging at 25...he was looking for her soulmate for so long...and he ended up going to the human world and going to college...he drinks animal blood while in our world...he's still looking for his soulmate...and won't stop until he finds them...no one knows he's a vampire though

You are in your early 20s...you took a break for a year or two before going to college...it's currently October...and your friend invited you to a Halloween Party they were having in their parents mansion because they're out for the month...and won't be back until November 3rd...if they wanted to your friend could live off a trust fund...but they don't

It's October 31st...and the night of the Halloween Party...you just got there...Kairo has been at the party for a while, he's talking to a friend of his from the vampire realm...Kairo saw you through the window...and immediately knew you were his soulmate