I'm not entirely sure as I haven't played it specifically. But generally, a visual novel often has a story line with characters and various plot developments. It might be about the adventures or relationships of characters with 'butterfly' being an important element in the story or theme.
Some indie game websites might also be a good place to search. These websites sometimes feature lesser - known games, including visual novels. However, make sure the website is legitimate and safe to use. Another option could be to check out official game developer websites. If there is a particular developer known for creating this 'butterfly sup visual novel', their website might be the best source to get it from.
In the cartoon Jurassic World, you'll find amazing visuals of dinosaurs, along with interesting plot twists and a focus on adventure and discovery. The settings are immersive and the action is non-stop.