@liuliuliuman that makes sense. Probably because this is the first time he's ever experience someone actually caring for his wellbeing. His gramps barely does, parents even sent him away, side chicks and fwb just use him for sex, aoi and the other dude that go with him for jobs care for him but don't really show any tender love and they aren't really close to him cuz, just like everyone else, he's hard to read and straightup scary/insane plus they're his guards and yakuza(aoi actually beats him up the most). But yoshino, despite believing he's at least 90% scum, terrifying, and hard to read, still extends care/concern to him even after just recovering from sickness or all the other crazy stuff he does.
he's got a long way to go before she sees him as anything other than scum tho. Pretty sure right now, even in the most recent chapter 17, his current status in her eyes is "reliable, scum-acquaintance(?)" And she's valid. I love how relatable she is yet also out of everyone (including the audience's) league.