Oh, now that depends on you! Obviously, I can't force you to do anything you wouldn't want to... but were I to give you a job or task, depending on just how well you've carried it out, I'll deduct what your work would be worth from what you owe me.

Naturally, you'd be free to turn down any job you wish... Ah, but if you do that too often, you'll be in my debt for quite some time! Maybe even years.

[It's a pretty generous offer... you know, aside from just forgiving him altogether. But he has to find some way to keep Rin around, and he's certainly not going to make that ally offer to him again.]