Afterwards, it became clear that I got just one of many endings. Presumably my choices affect which bird I end up becoming close to, and since I spent all my time choosing the library, I got Nageki’s ending. Nageki who was… a ghost. WoooOOOO! Oh, spoiler. Sorry.
Yes, I was “getting close to” birds. Mostly pigeons. In school. And no, I wasn’t a bird as well – I was a human girl who lived in a cave and considered themselves a hunter-gatherer. Look, I didn’t come up with the game’s concept and quite clearly whoever did was dropped on their head as a child because even within the bizarre realm that is Japanese dating sims, Hatoful Boyfriend is elephant grade nuts.
I expect I will play it again for other endings. Because I happen to like elephant grade nuts.