<report>Trash. You are better off reading the original manga as this is a complete adaptation of it just with some internal monologue added. The VN is made in tyranobuilder and offers 2 scenarios (Halloween) and (The Witch's Spooky Mansion) available from menu which lead to short 15 minute h-scenes.
In total you get 9 CG sets that make up the entire game. The scenes are painfully vanilla and while there are mentions of anal, bondage or any other fun things, it is just slutty perverted vanilla sex. The second scenario offers shota h-scenes in costume. Mizuryu Kei is obviously known for that.
The ahegao game is on point. I would have expected voices from seiyuus picked off the street, but no.
I just wanted to play smth for halloween tbh. 30 minutes do not justify the 1100 yen price tag on DLSite