This is almost like the Bizarro World version of Doki Doki Literature Club: Instead of being cute girls and horrifying twists, it's horrifying demons in a cute, wholesome dating sim. (Though, the demons are actually also cute.) In a very strange way, it's the most classic ren'ai game I've seen in a long time: Despite the parody premise, it's a straightforward dating sim where the character personalities clearly map to classic VN archetypes, ex. Cacodemon is the bossy but well-meaning leader. The music is great, the art is strangely endearing, making even the demons oddly adorable, and the writing is surprisingly good; it's easy to make shallow parodies, especially with VNs, so it's refreshing to see something that's both a parody of traditional romance VNs and a well-done example in its own right. There's also plenty of humor mined from the DOOM setting, from the Revenant being a dedicated trumpet player to the Mancubus' flamethrower-hands making everything difficult. I also enjoyed the Cyberdemon's cameo role as the Mean Girl!
Unexpectedly cute and a lot of fun, but I think one of the best things about this game is its version of that iconic DOOM artwork on the title screen, which looks like a horde of demons trying to ask Doomguy to Prom the Icon of Sin Festival. Did one of those demons make him a mixtape?