I'm not a fan of this plot because it makes no sense. That's obviously not normal behaviour so why does Yuha act like that? No explanation whatsoever, no trauma, parents seem lovely... It's a shocking development but in my opinion it falls flat because there's no logic behind it
My guilty pleasure is totally this type of story with a forbidden love between non-blood-related "brothers". I don't love this one however because the translation is a mess and the pacing is way too rushed. Also I abhor the daddy kink so I'll pretend those few panels don't exist. And why do they keep talking about whatever while fucking? It totally ruins the mood.
What if this guy causes jealousy issues which end up in a CONFESSION?? I'd so love a confession, we've been waiting..