Hi, Miles.

I am neither the author nor the purchaser, so this may be an inaccurate answer.

1.The difference between the paid and trial versions is simply the number of events.

2.There is no official guide, but there was an article summarizing the event. (Japanese)
https://ch.dlsite.com/matome/89202

3.It is an old game and a sequel or DLC release will probably not be released.
Expect a new one.

Currently, a demo version of the new game is available for download at the author’s Cien. (You need to follow the author)
https://ci-en.dlsite.com/creator/2307/article/901122

Have a good scatological life!

1. What are the differences between the trial version and the paid version?

2. Is there some guide or walk-through for the game? I read that the game has specific quest/scenes between dungeons.

3. Is it possible for the developer to create a sequel o a DLC content for the game?

Thanks in advance

Hi, Miles.

Unfortunately, there does not seem to be a recollection room in this game where you can watch all the scenes.
Many players seem to go back and watch the events by saving the game frequently.