Don't be confused or misled by what is said, by me and others.
Basically speaking, there's three different component in a game, its story, the player involvement, and the lewd.
We mostly talk about the second ; behind its Choose Your Own Adventure feeling, hide a Kinetic Novel with a little plus. As well as about the small (in regard of what is usual on the scene) inconstancy in the story.
But this doesn't mean that the story isn't interesting and/or entertaining. Perhaps have I became jaded after so many games played, but false promises, voluntary or not, and bad realizations do not prevent me to appreciate a good story. And it's what this story is, good with a mystery I, and I'm sure that I'm not the only one, want to know more about.
As for the lewd, it was clear since the starts that, due to the lack of working heart, there will be more tease than effective sex. So, if it's the "good content" you're talking about, it will never be substantial.
So, in the end, the game could be way better, but it doesn't mean that it's bad. Despite its default, it stay above the average.