i like to imagine that Ryūnosuke saw Chūya before both of them joined mafia but Ryūnosuke thought Chūya was a weirdo (and probably Chūya thought Ryūnosuke was a weirdo too)
i like how this could be interpreted (if you squint enough) that Ryūnosuke is so used to Chūya sleeping on a ground he doesn't bat an eye, just acknowledges Chūya and goes away
there's some nefarious individual who keeps lying about bsd news... personally i think it's a disgrace that someone would spread vicious lies and rumours about news of part 2... shameful behaviour honestly