"The Promise" Lycoris wasn’t always a dim-witted, scythe-swinging servant of darkness; she was a well-known agent in the Rubina: a holy organization of skilled monster fighters and vampire slayers. In this scenario, we go back in time and explore the circumstances of how she and Aoi came to be formally paired together as “buddies” in the Rubina. On a deeper level, we hone in on a particularly gruesome event that would come to shape their eternal love and respect for one another—a bond which can never be broken. "Homeworld" Dernière, one of the many worlds that exist in different dimensions. As holders of a special power known as "life force", Dernièreans were blessed with vast energy and extended lifespans, and they lived in glorious prosperity. However, even for them the day of ruin approaches. Taking place thousands of years before the events chronicled in Libra of the Vampire Princess, catch a glimpse of Dernière’s tragic history and the lives of those caught in the middle. You will meet Aconite Embroche, the determined leader of the Bebel’s sixth commando unit, and his smitten lieutenant, Iris Pumila. Together with Galega Officinalis, a lecherous and gifted dollmaker, they will use their superhuman powers to combat the infected life force from spreading and consuming their homeworld.