You're still my guest. [It doesn't matter if the guest invited themselves over, does it? It's his house and not Shun's, so Shun it still a guest. That is the logic he'll be going with here, anyway, although he'll probably be less stubborn about it if Shun still wants to help with things in the morning.

Now that they're inside, Ren lets go and takes a moment to user the kittens back inside as well so he can close the door again. As he turns back, he also thoughtfully eyes Shun's clothes--no, if he's going to take a shower, he shouldn't put dirty clothes on afterward--and then thoughtfully eyes his closet.]

You can borrow some of mine. Since I like wearing clothes that are a little big, I'm sure I have some things that would fit you.