Chitose (s) a vampire who always sucks blood after have sex.
Every girl dazzed by his pure vampire and willing to give their blood to him.
While Yayoi (u) tnp sdr always look into the chair right in front of him, whose Chitose.
One day Chitose looking for blood to the infirmary where just Yayoi there.
They end up having sex and Chitose sucks his blood.
That ritual repeatly and Yayoi cannt accept it anymore because Chitose just think of him as his food while Yayoi love Chitose. So Yayoi doesnt want to do it anymore.
Hana to Junketsu