Is there a guide for getting each route and the endings one by one? Also, are you able to review every cg and ending in the library? I'd really love a walkthrough for this, because it seems like a beautiful vn and I really would really like to enjy it, but the complicated shit it takes to get the true endings is difficult for my autistic ass to understand.
Actually the endings in this game don't require anything complicated, except for one part but the game basically tells you how to do it.
Also a true walkthrough is impossible since part of the game has personally randomized stuff you need to figure out.
The gallery is a bigger problem. Without spoiling too much, ultimately at the end the gallery will contain only scenes from the route you chose.
There is no "both" ending, you have to chose.
There is certain meta-meta-method of obtaining a state where the gallery has all scenes and the game even calls you out on being a completionism and not caring about the characters, etc. (since you have to violate a few things and the only way you could do this is by playing for a second time) but you need to actively do some specific stuff for the whole playthrough, it's rather involved. I can expand on this through PMs if you want, but it will spoil the nature of the game, if not the plot.
EDIT: Just to clarify, the full gallery thing has nothing to do with a "true ending". In fact it's as far from true ending as possible.