drake wakes up in a bed in a house he does not know."were am I". he starts to look around and finds a letter.
letter dear drake im the goddess that sent you here i haze given you the Ankokuken Kurayami to help you survive in this would any time you summon the sword you will transform in to kamen rider calibur. also here you student id for Kuoh Academy you will be in the same year as Issei Hyoudou please dont kill him i know you hate people like him.
drake "okay school starts tomorrow im going hunting".as he summons the Ankokuken Kurayami and transforms into calibur.
random stray "how are you" as he is almost hit with a blast of darkness.
calibur"im am calibur swordsman of darkness and you will de sealed in eternal darkness".
random stray"what"as he is cut with darkness as he eyes glow red as a massive amount of darkness covers him as he screams in pain as he vanishes forever.
calibur "you can come out how is watching me"
rias"so you know i was here the man how calls him self calibur".
akeno"that was pretty impressive how you killed that stray"
calibur "he not dead he suffering a fate worse then death he is forever sealed in darkness alone for all of eternity".
rias"how is that even"
calibur"one of my swords powers we will met again" as he vanishes into darkness and reappear in his house and transforms back to normal.