Just did a search of this thread for walkthrough and it threw up a full 6 pages of results (and who knows how many more if I'd done one for "WT" and "guide" as well, LOL. With such demand and yet only one partial write up in one post, it probably means a formal one - official or unofficial - is not going to happen anytime soon.
As such, I'd urge the dev add an unlockable scene gallery in sequential order (if we unlocked number 7 but 6 remains locked we would know that we missed one) to act as kind of signposts. RPGM's clunky save system and lack of fast skip is really not conducive for exploring content blindly.
Edit to add: Most RPGM games have galleries in the form of a "Hall of Memories" which the MC can access via activating a designated item (computer, night stand, calendar, picture frame etc.) at their residence.