Just want to know if I should buy it or not.
Is this any different from the free version?
Is the ending any different from 'Just Monica' or there is more to it (in this case don't spoil me, thx).

[quote=Jack Garrus
Is the ending any different from 'Just Monica' or there is more to it [/quote]
"Just Monika" was always just act 3, there's an act 4 as well.. You know that, right?

Plus adds side-stories (there's more to this, but I'll leave it at that), more hidden content and unique ways to unlock said content since you're not able to access the files like in the free game. The free content is still here with added achievements, but this part remains ultimately unchanged short of the higher resolution.

A bit spoilery, but something you'd pick up on soon after starting the game:
There is more story going on outside of the main game and side-stories, but that's up to you to find out.

It's worth noting that all physical copies of the game come with all the additional goodies, so if you have one of the consoles you might want that over the Steam version.

its basically just a ddlc dlc, extra content to the main game. Did it really needa whole new game? debatable.

thank you@Tregrenos and @lulbail. I kinda hoped it was the continuation of the whole thing of Project Libitina, sad