Yeah there’s a lot of cardigan/skirt/blouse designs in the design shop. You can probably add at least 10 more designs to that list LOL. For example, “Cute school girl”, “Buniform”, “Cozy Sweater - Coffee” (which are all lovely and made by different players).
The whole concept of a cardigan/high waist skirt/blouse design isn’t exactly an original idea in the design shop. Almost my whole list of “favorite artists” in the shop are from seeing similar designs, but none of them fit my character well. I just made my own version that matched my character’s color scheme with the “Pinkish Skies” dye ¯\_(ツ)_/¯