Under the Vampires' Rule (Levi x Eren)
@Kawaii_Eren_Writer figured out this brilliant plot! All credit goes to her.
It was the end of the war between vampires and humans. Humanity lost with devastating losses of land and lives. Levi is now the current prince in line to be king. Levi is looking for a human mate with the AB blood type because that is the only blood type that royalty can gain true power from. When cargo #1928 comes with a set of 12 teenagers, Levi spots a bright eyed, fascinating human and picks him to be his mate. But the thing is, some people don't accept defeat, and in the shadows lurk more than just the vampires and creatures of the night.