thats quite the literary criticism coming from someone who seemingly can't even use proper punctuation.
But still, your point still stands, the overarching story frankly isn't that great. I mean, it's great compared to other porn games, but nothing compared to great novels.
What this story does do pretty well tho, is being the frame for the painting, so to speak.
The strong point of this game besides the humor and the nice looks are the fleshed-out characters. Even the side-characters have their own set of morals, views, problems and goals, which makes for a interesting dynamic and seemingly living world, even tho we basically only have a school with one class and four staff members, as well as some yakuza guys, your own family and your neighbors. that's it.
But for a porn game, this is quite the big cast, while the characters are quite nice even for non-porn standards.