DIABOLIK LOVERS: The Blacker the Better

With her family drawn into a war by the Vampire King, Natsuka Washimine sets off to play her role in the upcoming battle, and what better way than moving in with the enemy's family.

But living with not six, but ten male vampires is draining her energy. To keep them busy, and away from prying through her true motives, Natsuka finds the perfect solution: opening a butler cafe in the Sakamaki's large mansion; a cafe dedicated to serving humans and staffed by the very spoilt vampires she has to watch over.

It's not the most ideal situation, but it's certainly turning out to be informative, dramatic...and fun?