This game has the potential to be an all-time great, but Jesus Christ it's been four years already. The problem with writing whether it be smutty adult visual novels, movies, books, or TV is that you set a goal and once you get there, then what? It's like when a dog chases a car and finally catches up with it. The dog has no idea what to do. The issue with these "slow burn" VNs is that nailing the main girl(s) is almost always the goal and there are no idea beyond that point. That's why a lot of VNs have abrupt or rushed endings - the devs literally don't know what to do with the story after that.
Devs seem to forget that porn games need to have a lot of porn in. To me, in adult VNs sex scenes should be like how Homer Simpson once described alcohol - the cause of, and solution to, all of life's problems.