The title is misleading, there's only one story here and it's not short and doesn't seem to be finished yet.
The story at first looks interesting, two couples, one older and experienced, the other young and inexperienced, their relationship. But it seems to me that everything develops too linearly, all four immediately accept their roles and then act according to their position in this pyramid of dominance. I think there should be drama here, but there just isn't. Especially annoying is the young guy and how submissive and spineless he is.
Scenes are the strong point of this visual novel. I don't like female domination but the first scene between the girl and the boy where she establishes a relationship was pretty hot. I'd especially like to note that unlike most other games with AI art, the developer tries to show both characters in a sex scene rather than the usual girl and dick or a man's body part without a face. This is a problem for AI, interaction of two consistent characters and it is clear that the developer has put a lot of effort to show full scenes. That's what I liked the most here and what makes this game stand out. But the problem here is that sometimes you lose consistency in the portrayal of the characters.
Maybe it's just me but I found it too wordy, everything is explained in too much detail, it's just annoying and I started skipping the text towards the end. Some of the scenes and conversations are going on too long.