Does this game have a walkthrough or not need one to get good endings easily?
Hello!
There's no walkthrough needed :D There are 2 endings for each love interest; a romance ending and a friendship ending. Basically for the first half of the game, you can either flirt (these answers are marked with a heart) or give regular answers. In the second half of the game, based on whether you chose flirty options or not, you'll be put on the romance or friend path. Both endings provide the same opportunities to interact, they just play out differently.
If there's no heart indicator on either of the dialogue choices, that means it just influences the next dialogue or the next scenario without affecting your romance chances with the love interest, so feel free to pick whichever!
Hope this helps!