The scritching makes him go even more limp against Erwin -- he likes having his hair petted well enough in human form, but the ear scratches in a furry form feel absolutely divine -- the negative emotions continuing to slowly fade away, being replaced by a sense of tired calm.

It's maybe a chapter or two later that Levi starts to really doze off -- and sure enough, as he dips partially into unconscious slumber, the magic finally unclasps. For a moment, it looks like the wolverine is suddenly growing larger... and then it's Levi, his head rested sideways on Erwin's chest and his limbs tucked around him.

The shift does end up jostling him a little and he wakes from that almost-snoozing with a start and a quiet gasp, glancing around in confusion. I was going to say his clothes shifted with him but it would be kind of funny if due to him being new to this only the cravat managed to stay on... maybe too much of a mood shift though. We gotta do sad things here. He stares at Erwin a moment, sighs out something like an ugh, and plants his face right back into his tits chest, a half-muffled grumble following.

"I had to piss in the litter box."