You can't do anything wrong in this game. There is no story with several outcomes. It's more like an adventure game as a vn with several storylines.
It's about try and error until you get it done right, but it's not overly complicated.
Sometimes you want to do it wrong on purpose

(remember the movies Groundhog Day or Palm Springs)
And make sure to find the hidden events list. The "zero fucks given" days are more groundhog day like than many other parts of the game.
ps: There is no NTR in the main storyline. Three or four of the bonus events - non canon (or happening before the storyline, who knows) - include someone else, but even then the MC won't be there, so it's no NTR in the sense of the word either.