Not saying cause ion wanna spoil it for anyone else who may wanna check the comments for tips, but I will say that you'll unlock Ending #6, of which imo is the best ending, at least for what we have so far in the Itchio version of the game.
Oh, also, make sure when you're on your date with Hinata, you go down the Love Route, the Itch version allows you to watch some of the Patreon scenes for her, which helps build the Love Route bar.