Found kaien he living with yuki in ক্রুশ academy, bite made him hate the ভ্যাম্পায়ার and because he hate vampire he hate and night class and this is why he was decidet be a vampire hunter.
Trained দ্বারা yagari and teaming with yuki he guarded academy দ্বারা means of bloody rose his weapon.
But as epected vampire behavoir he had made to bite his lover not allowed Yuki.