I'm writing a new comment because I can't answer your questions, it gives an error. The problem is not that the characters are boring, but that they are the same, there are a lot of anime, and there are a lot of characters from them, but you use the same ones. The next problem lies in the photos themselves, they are just photos of naked girls, there are a lot of them on the Internet, even in the games I mentioned below, there were photos that looked natural, uninhibited and very erotic. Intimate scenes where facial expressions are important, sometimes the best erotic photos are not obtained with a naked character, but in a situation of dressing up, accidentally torn clothes, wet clothes, intoxication (do not violate the image of the character by wearing clothes other than the original, there may be exceptions due to the concept of the game is that the more the character looks like look at yourself in the original story, so much the better). As I said, since your most important content doesn't change much, it doesn't make sense for games to stay on your phone after completion. I think you don't watch anime very often and don't play games of this genre yourself, so you may miss some moments, games are fun, and games 18+ are even more fun))))))) I can understand the reasons why you release games in this format, but it's not a panacea, and it has its drawbacks, you won't switch to another game format, so it's in your power to eliminate the drawbacks that you have. And don't think that the format when you made games based on one work is bad, you just didn't do very well with the backgrounds, several characters from the original story (not only female, they can be added without permission from 18+, just for the atmosphere) are trying to make the games intuitive, not everyone knows English, and I personally write through a translator. This post was much more informative (I liked the Cara Upgardes game because of the game mechanics, not because of the presence of 18+).