He Made His Sacrifice Vampire Queen Manga

Half-blood Asher is sacrificed to thousand-year cursed vampire king Lucien on blood moon, but Lucien publicly kisses him and names him Queen. Asher learns he is a substitute and a pawn, then awakens his past life, takes the royal blood pact, purifies Lucien's curse, avenges all his persecutors and stands beside Lucien as the rightful Queen he chose to be.