Diabolik Lovers – Haunted Dark Bridal (Anthology)

Yui Komori finds herself stuck in Japan with distant relatives, the striking and unfeeling Sakamaki brothers, when her father – a priest – is deployed to Eastern Europe. Yui soon discovers the brothers are merciless vampires, who view her only as an insignificant target for their thirst.
Forced to attend nighttime school and follow the brothers’ every directive, Yui must conform to their restrictive laws and unquenchable hunger for blood. Her own welfare is disregarded, and the brothers have no concern for her potential death from anemia. Struggling to maintain her mental health, Yui is torn between the possibility of falling in love with one of her tormentors and enduring their brutal flare-ups as she satisfies their deepest cravings.