Walkthroughs of this game don't really exist because everybody can replay the game as much as they want. Most people replay the game until they have done all the possibilities and save at the end of each phases or chapters with the ones they connect to the most. Walkthroughs are usually for games where your choices can't be changed (or it's very complicated to do it again), here you don't have this problem and most players like to see both good choices and bad choices. Also once you play the game you can accelerate the conversations you already had, this mode gets you pretty quickly to what you're looking for when doing a replay: the choices.
I hope this helps you in some way. On the wiki we won't put a walkthrough (or maybe like a long time after the game is finished) but we have all the choices for each chapter: https://tteots.wikia.com/wiki/Prologue#Choices_to_make & https://tteots.wikia.com/wiki/Chapter_1#Choices_to_make Also in the game, if you click on "log" you can see all your past conversation and scene written.
I know it's been like months since you posted this post (we don't have notifications for this) but I'm still writing an answer in case someone else has the same question.