I figured it out while looking thru the code, in the code See-Through doesn't appear to be a label; instead all clothings have a list of body parts they cover, sometimes followed by a second list of things that would be things mentioned in the first part that are see-through. ngl when you actually look under the hood there's a lot of things the game is leaving out, like how High-Cut Legged Leotards count as sluttier than their normal counterparts, or how some options when buying clothes can change some tags or make them count for different categories that aren't mentions or change the wardrobe malfunction chances; also they all have descriptions for after they are bought that I cannot figure out where are used in game.
:3