There's no button for this and it would be a very welcomed addition. Each holiday shop you buy from (I am willing to venture a bet that the Antique Shop is like this, too) doesn't give you the option to add directly to wardrobe. Please add?

add to collection buttons for plushies and beanbags would be nice too I'd imagine.
You technically can by paying the cheaper price for the actual collections.
Dexter by ❤
Omg ;-; I saw Antique Shop in the OP and thought she was only talking about that xD
Dexter by ❤
nah I knew about that :p antique shop is quite nice that it does that, though I wish it would remove the books I need from my wishlist too haha.
I would love this, especially for the plushies and beanbags. Does the Subeautique have an 'add to wardrobe' button after buying something? If not, that would also be nice.
there's something pretty satisfying about buying like 30 things at once and quickstocking them into my wardrobe tbh p: but yeah, a button for one or two item purchases in the holiday shops would be pretty nice o: