In world a spices mix and now humans, demons, wolfs, and other ancient creatures coexist. One of them vampire is always alone and one popular man try to invite him to his friend circle. On pe class vampire felt bad and collapse so his bat butler found popular guy to help. Vampire suck his blood and get energy. He discover his identity as merman. Merman start to play in his master sevant relation ship and give vampire blood and masturbation. Vampire feel so good and pleasure. But soon tame a former merman's friend from childhood appeared. He and kairi spent all the time tg and rio (vampier) felt abandoned. He was kinddnaped by tame and kairi had to rescue him
Ore-sama na Doukyuusei no Kenzoku ni Narimashita