That was a very enjoyable read! I was very engrossed in the bits of information going on in the background, such as whatever happened to Layne and what kind of relationship she and Mace had.
(Spoilers)
The one issue I have with it is the pacing of the sex scene between Callum and Mace. They've known each other for years, are close enough that Cal was essentially living with Mace's family at one point after being kicked out, I assume nothing sexual had ever happened between them either, yet there are only two lines acknowledging how monumental this moment will be for their relationship, and Callum's feelings towards it happening.
I assume that's partly due to being a one off, and feeling limited about how much time should be dedicated to that moment between them, which I definitely understand. But given the story is so character driven, I feel like it could've benefited a lot from slowing down and really getting into what that moment means for the two of them.
Mace was a really charming guy! And I loved the art, especially the piece of Mace as he's about to use his shotgun.
I had no idea this visual novel was in the works, from my perspective, it kinda just showed up out of nowhere two hours ago, so I went in with no expectations and it did not disappoint, if anything, it left me wanting more.
Great job, definitely worth a read and a recommendation.