This is a REALLY cute VN that's worth a shot! Here's a review, if you want a TLDR to just see whether you should play it or not, you can skip to the last paragraph.
I was surprised--some VNs I opt into downloading might have art that seems inappropriate for the setting they're trying to convey, but the art style for Demon Kiss was very appropriate in each scene. Their models and portraits are fantastic, and the backgrounds are immersive and does the story good. The story is fun and realistically written--it's not too corny and while there are very few grammar or spelling issues, it's not a story that's so seriously told that it would pull you out of having a good time while playing it.
Story review with light spoilers
The story itself is actually good--I guessed the plot twist, but that added to the excitement for me. There were some parts, especially alongside the time skips, that felt rushed or poorly paced regarding their romance. I'm torn between the romance being too quick, or if I just wanted more--but that goes to show that it WAS still good, I just felt left for wanting regarding the more romantic, or why/how they came to feel for one another.
I LOVED that the main character didn't have any kind of struggle or hesitance regarding his sexuality! That was one of my favorite bits--it's EXTREMELY rare for a VN to not have a "but we're both m-men" moment, and that alone is enough for me to totally forgive and forget the pacing of it. We love to see a gay protag officially reveal himself to his prospective hellbound boyfriend, so that's a big kudos to the writer.
I loved the 'lore and the world created, I feel like there could very easily be spin-offs, other stories in the same world, as well as other games. It's a really cool representation of hell, class ranking, as well as magic limitations. Very well done.