how can i make hatto use costumes?
You have to buy them during nightime at the love hotel, but be careful, because you have to buy the right size, wich depends on your boyfriend. I dont remember the name of the sizes but from left to right, it is :
Toru-chi > Hikaru > Tocchan > Shuu > Shiba
Once you bought a good costume with the right size, you can use it during foreplay mode ^^
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)