You don't need a walkthrough, though. There's something like 3 places to check in single location and if you fuck up you can always just rollback and pick the option which actually works.
If someone lacks brain capacity for that then they're unlikely to find the walkthrough in OP and download it, either.
That still doesn't solve the points problem though. Or the need to go through "perfect" playthroughs to be with someone despite everything the characters have gone through together. They have been using a point system in all of their games and still haven't been able to wrap their heads around it. At some point you'd have to think that maybe it's not something you should try again.
I got locked out of every good ending my first time because of it. I focused only on the cousin and was still unable to get her ending. I actually did use the built-in WT the second time and I swayed from the guide one time, count them, one and was locked out of her path for not having the points.
Unrelated to the points but I also don't know what they were thinking with the writing of the cousin's character in the end of the game. She goes from a shy wall flower to
showing off her naked body to her mother and getting fingered in the middle of a restaurant in the span of one date. She's not even the same character by the end of the game and you can't claim it's "character growth" because it's not.