'That Fateful Night' feels like catching an episode of a drama series, mid-season. It's a very well presented with amazing cut scene illustrations, custom sprites, and even a really hot animation at the climax. It's an engaging piece that can stand on it's own, but feels the pull of wanting information from the work that this is connected to. I think being a prequel might be double-edged, in that it (possibly) does not want to spoil future plot points. A few of the details that feel omitted and leave the reader scratching their heads at a situation that comes across as melodramatic.
To get into the story a bit, the initial breakup of Patrice and Nia is kept vague, either due to potential spoilers or putting in too much trust in the reader to fill in the blanks themselves. Patrice is so extroverted, comfortable within their own sexuality, and considerate of his flirting, that his two year commitment issue he's hung up on, feels a bit contrived without further explanation for the specifics. I only bring attention to it, because it's the crux of the conflict within the story itself, and all the actions Patrice takes hinges on his inability to move on. Is Patrice hung up on Nia because he feels they could get back together in the future? Is something preventing that? Why does Nia fully cut contact off with him despite seemingly sending money and being in contact with Liam? Why does Liam not talk more about it with him? With how they treat the issue with such finality, Patrice still feeling like he can't move on from the relationship after two years apart feels a bit flimsy and in contrast with his extroverted characterization.
That being said, the actual romancing, flirting, and erotica of this story is really well done. I love it when Patrice flusters Oliver. I feel like a little too much time is spent on Patrice and Liam's witty banter and sex jokes, but I think that might just be subjective and me wanting to understand what is up with Nia anyway. Oliver is great as the shy introverted virgin that gets his heart broken. It feels like the plot really paints Patrice as this selfish/inconsiderate guy, so the text has to go out of it's way a lot to remind the reader what a good guy he is and justify his actions. I feel like it was written this way because it's meant to end at the starting point of the other work it's connected to.
As far as the theme of 'light in the dark', the story presents it as illustrations of moonlit sex and finding love in a time of depression after a breakup. Though, it feels a bit more like a secondary theme to what is more focused on exploring Patrice's backstory. It holds itself to one too many criteria that it has to meet; being a prequel to another work, the game jam theme and being a self-contained story. Overall, I think this is expertly produced, has amazing visuals, and the romance is great for a "my wolf" visual novel.