Ragna was walking through the streets of Orient town in the 13th hierarchical city of Kagutsuchi until he saw a couple of officers from the NOL.
Ragna: Oh great...
Ragna was about to fight the officers Until he was transported to Alucard Castle.

Ragna: Alright what's the big idea rabbit!
Rachel appears in front of Ragna.
Rachel: My, Bad-tempered as usual.
Ragna: Very funny... so why did you bring me here?
Rachel: There has been a new threat that is not from our world.
Ragna: What the hell are you talking about?
Rachel: You will be transported to another world to stop this threat.
Ragna: Another world? And who is this new threat?
Rachel: I'm afraid I can't tell you.
Ragna: Come on! You gotta know something about this "new threat"
Rachel: You'll have to find out for yourself.
Rachel creates a portal below Ragna.
Ragna: What the Hell's going on?!
Rachel: Fare thee well. And good luck on defeating the new threat Ragna.
Ragna: What the-?
Before Ragna got to say anything he fell through the portal.