I'd say there's nothing wrong with dark stories, but to pull off ntr+including men in yuri you need to be at least as good as Kodama Naoko (even then I almost dropped the author after reading netzusou trap). As in, it can work for a great story that requires such themes, but starting from the decision to include them cannot be a good idea. In this one-shot, the world MC creates is one where a huge amount of women have to go trough some of the most painfull imaginable experiences. In short, I heavily disagree with everything Izusu stands for