The game is freely available on the developer's blog.
More information is available on VNDB.
This is a step-by-step walkthrough, designed to show you all the scenes in the game, both main and secondary ones, that can be missed. While the game has an in-game hint option, it will only show what's needed for the main quest and won't delve into the side-quests. Additionally, it is not always completely correct.
Anyway, maybe it's possible to streamline the walkthrough a bit and see everything in a smaller number of steps, but I cannot be bothered to try and do it. :-)
Majority of the choices in this game consist of where you go in the map and who you talk to. Let's begin.
