my random observation on toya being texture sensitive with clothing based on what he wears
(please don't think too hard on this its more random thought than anything)
i realised that toya likes to wear inner shirts a lot which makes me headcanon that he doesn't really like the feeling of his skin and torso rubbing on fabric directly or he tends to feel cold easily, since he also doesn't handle cold weather well, therefore wears more clothes to feel warmer.
which leads me to believe that toya could be texture sensitive for clothes too, which has also been addressed before as he says that akito picks out clothes that look good but also feel good on him.
there are probably certain fabrics, and perhaps rougher fabrics that make toya feel uncomfortable so he wears an extra layer to ease that. if its a thinner fabric, i like to think that he'd also wear one. i delusionally believe that he's especially particular on cotton and wool, so if something's remotely a cotton-polyester blend for example, he'd wear an inner shirt. i also like to think that for hoodies and turtlenecks, as they're thicker, he won't wear an inner shirt unless he feels extra texture sensitive on a particular day.
but him wearing extra layers could also be sort of sensory seeking -- maybe toya likes his clothes to sort of, hug him warmly, probably from being used to wearing lots of soft sweaters and shirts when he was younger, that's why he layers an inner shirt to simulate that warm feeling when he craves it.