Kind of a weird problem really. I went to buy a Yukata off the store yet strangely couldn't find it. Searched via Costume Set, Armour and Moonfire Faire and they didn't show. I took a print screen to show what I'm seeing:
https://imgur.com/a/Wab6GOS
Now I was able to find them by going through everything without using any filters but it's strange that they were hidden from me like that via the filters. Figured I'd report it anyway.