I have mixed feelings about this manga, not just because of the ending but the whole thing have ups and downs all way through, it heavily differs from it's original source (the novel) in a way that looks like almost an alternate universe, the change in Misaki background was awful... they just made her a rich kid with a personality disorder, while in the novel/anime she really have scars from the domestic violence she suffered from her stepfather, the way this fucked up her mental health give her much more depth...feels weird reading this after i've finished the novel and the animated series, well at least i laughed a bit.. some parts were really fun due to the amazing art, but the cherry of the NHK cake for me still the novel.