
He's planning something I can sense it ( ̄∇ ̄")

I mean he's not a bad guy. If he thinks about everything, he'll have to plan it through to where it won't effect him in a big way or bad way and keep it to where Koichi will stay. He'll most likely consider kidnapping him again. But they're at the palace now so security is great or greater. Plus Klaus knows magic. The most likely best outcome would be trying to talk him out of it or something similar. He might kidnap him to chat. But that's just my speculation.
I mean yeah he most likely does like him but the problem is ... with that sentence being blatantly thrown at him whilst being blind in rage, maybe he'll try to suppress those feelings and replace them with even more anger, because of the turmoil in his head.