I live in the yokai world

Robert Richardson is a foreign exchange student he came from Japan to start a new life in Tokyo university it was a happy life for him but unfortunately his life was change when he witness the death of his friends by a mysterious woman named Claire she's a half vampire half werewolf hybrid and she came from another world she said to him that you will die in 7 days
then I will come back for you and I'm gonna take you to my world