Kyuuketsuki wa Shinzou no Yume wo Miru

"He'll do it with anyone if asked, even with me." It's not easy for college student Shuri to harbor affection for Hisato, a vampire who's been like a father to him, when Hisato will kiss, have sex with, and even whisper words of love to any who wishes for it. Wanting to become the "soulmate" that Hisato has been yearning for, Shuri is ruthlessly eliminating people getting close to him, but there's no end to people willing to give their blood and bodies to Hisato in return for the pleasure they get from getting their blood sucked...

(Source: Renta!)