Manami is targeted by the rival vampire clans the Draculas and the Corvins on her 22nd birthday. That night, young men and women are invited to Hotel Requiem where a nationwide matchmaking convention is being held by the Yamada, a mysterious man who lives in and operates an ornately beautiful, palatial hotel with his partner Elizabeth Báthory. Yamada declares to the gathered crowd that tomorrow will be the apocalypse and only the people inside the hotel will be saved. The vampire K, who possesses tremendous power, attempts to save Manami in a raging battle.