Thanks for the answer! But I think I didn't structured the question the right way. What I wanted to ask was how Hatto wore the costumes himself, because on Meyaoi's patreon there's a photo of Hatto with the cat costume! But I've already found out (at least on Shuu's route): you have to wait until it's his birthday and he'll ask you to wear it as a birthday present (I made Shuu be dom top, but I don't know if that really matters)