I think that they make the rooms so you can have some privacy while you're changing, I'm probably not supposed to come inside with you? [Luckily? Horikawa has a little bit more mundane common sense. Anyway, the concern from Yamato is pretty endearing, but mostly he's perfectly fine with just waiting. He's had a lot to think about lately anyway, so the time might be useful while he waits for Yamato. Though, there is one exception that strikes his mind.]

If you have any trouble with the clothes though, that would be fine. Some of them will have zippers or buttons, so if you're having troubles then I'd be happy to help! [And he's good at that, too! In the meantime, he'll sit himself in one of the waiting chairs while he waits for Yamato to disappear back inside.]