25 years. I've waited 25 years hoping you'd stand by my side and protect me. Where have you been all this time I cried for help?

Only those who are precious to me can attack. Only those who have drank my blood can kill.

Demons plan to conquer earth, but the exorcists stand in their way. Humans have no clue about this and when schools experience unexplainable disasters, a website for students was born. “Portal”, seeks to help victims of fiends when exorcists fail to help, and also put an end to the battle against demons.  

  Human in the world of Assiah, Beast (Vampire and Werewolf) in Gehenna. The two dimensions are not meant to interfere with each other.But one day the two dimensions had clashed together. The humans who can fight these Beast are known as exorcists. Zero Nakagawa is a boy who bears the curse of being the ChessPiece (a person who holds the spirit of a werewolf , Vampire , God and Hu