It's hard to say for sure. You'd need to look at the source and any background information provided. If it's presented as a memoir or based on documented events, it might be true. But if it's clearly labeled as fiction or fantasy, then it's likely made up.
I'm not entirely sure specifically as there could be many 'golden hour visual novels'. Generally, a visual novel often involves a story with characters, plotlines, and usually has some sort of decision - making elements for the player. It might be set during the 'golden hour' which could imply a time of day like sunset or sunrise that gives a special aesthetic to the story.
I'm not sure specifically what this 'golden hour graphic novel' is about as there could be many with that name. It might be about a special time period (the 'golden hour' which is often used in photography to refer to the hour after sunrise or before sunset) and some kind of story told in a graphic novel format. Maybe it involves characters whose lives are somehow related to this time of day, like a mystery that unfolds during the golden hour.
I'm not sure exactly as I haven't read it. But generally, a graphic novel can be about various things like adventure, relationships, or a coming - of - age story. Maybe it's about a character's most important or 'golden' hour in their life.
In a 'golden hour visual novel', there could be a diverse set of main characters. There might be an adventurous photographer who is obsessed with capturing the beauty of the golden hour. There could also be a local who has a special connection to the place where the golden hour is most prominent, like a beach or a hilltop. And there may be a mysterious stranger who only appears during the golden hour, adding an element of intrigue to the story.