I really, really liked the whole premise and everything of the manga, even from the original. but this final volume dude... like, they could've done thigns so many other ways, the whole reveal was totally immersion-shattering because real people don't fucking act like that, like my dude what??? it was so fucking weird and then it got immediately shoved under the bed, and there were so many better ways they could've decided to cut all that out. Like, just make her feel guilty about her dad leaving and then him getting into an accident and passing, and her feeling like her inability to keep him around led to his death. boom. there's the emotional realism. and her mother is surveiling her because she's wondering how her daughter is doing but she's an emotionally unavailable, manipulative, and kinda shitty person, which makes sense in that story context, and she serves as a foil to Nekozaki, who started out kind of manipulative but realized the impact it could have on the people around her and decided to brave the danger of honesty. Boom. quick tie-up of all the themes and everything, and you don't have to waste space.
tbh this almost makes me want to write a fix-it fic of the story, but I'm already juggling way too many large projects... le sigh.