This is a simple story with a final twist. The visual part could require a little more work (the photographic backgrounds don't go well with Dario's sprite and the GUI design could be more attractive) but I understand that it is one of the first works of its authors and that they did not have a graphic artist.

This fact (being one of their first visual novels) is also noticeable in the texts, which could be more polished. The contrast between the (slightly cheesy) conversations in the first part and the melodramatic endings (especially in the "bad" ending) have an unintentionally humorous effect.

In short, it seems clear that this is one of their first visual novels. I don't want to discourage the authors with this comment, quite the contrary: the story, although simple, is interesting and engaging until the end, and I'm sure they can do better works in the future.

I've noticed a strange bug, but I don't know if it's a problem of VNMaker itself: After saving and reloading, the cursor disappears. Hope this helps!