Also, unrelated, by I was going through the events trying to get the Wakana's knowledge of teenagers, and stumbled upon what cemented my dislike of Osako:
Like, Wakana was very pushy, but she had the sense to not go this far, and actually apologise. Osako is just a fucking idiot. "your child abuser for 15 years can't hurt you, they're dead" after he straight up asked her not to talk about it, has to be one of the most callous idiotic things she could have said. In fact, that she loses sleep over her partner not being able to cum fast enough, and has the gall to talk about this lightly deserves a kick in the face.