"Well, that's true, but.."

That thing doesn't really look like skin, after all. Madoka can't imagine at all that constantly wearing something like that could be comfortable, but she doesn't want to doubt this person when he's been nothing but nice to her so far..

So the girl slowly nods.

"Um, i-in that case.. be careful if you wear it under the shower.."

Is he going to? She doesn't know, but his way of talking about it sure makes it seem like it.