
I think it’s more because it seems to be breaking Japanese social norms. He’s entering an office, which Japanese office culture is strict on how you can dress (often restricting people to wearing neutrals, what kind of make up and what nail polish if any women are allowed to wear, if they’re allowed jewelry and etc), and he’s wearing his shift in bottomed deeply exposing his chest, hasn’t shaved, and his hair is meant to look messy. Compare him to how he looked on their date and that is what you’d expect for the setting he was entering. We are definitely supposed to think he looks “crusty” and see he has been putting on an act.
so i'm guessing the seme was putting up a facade? and this crusty version is his real self lol