Kyuuketsu! ~Warawa no Shimobe ni Naru no ja~

My name is Tatsuto Asazono, A first-year student at Shibakyu Gakuen. I was living a fulfilling school life, when suddenly one day a girl with silver hair and twin tails appeared in front of me. Her ass had a tail, and she used magic. Believe it or not, she doesn't seem to be human. She called herself Arica and suddenly started sucking my blood. Apparently this is a proof of the contract as a servant , and I'm forced to be her servant without knowing the reason why. The role of the servant is to supply the blood that is the source of her magical power. It seems that it needs to be masochistic human blood, not just regular blood. From that day she started living in my house. Thus starts the days that I became her blood-supplying masochistic servant. [Translated from https://www.dlsite.com/maniax/work/=/product_id/RJ153032.html/?unique_op=af&utm_medium=affiliate&utm_source=vndb.org%2F]