Kyuuketsuki-san wa ChitoraretaiNew吸血鬼さんはチトラレたい; Vampire-san Wants Her (Man's) Blood Taken; Vampire-san wants to be Blood-Cheating; Vampira-san Quer Trair com Sangue

The overly serious vampire, Chitose's first love is her childhood friend, Santa. But when she sucked his blood, she realized. There's no way I have a fetish like this...!?