Yeah the game clearly wasn't made to be a porn game. It's a nod to older Dating Sim type games which were a bit more involved in the emotional side of things rather than "hey which sexy slut do you want to rail this playthrough ?" like we get more of nowadays. So the few sex scenes flow more into the romantic sides than being fap material.
It follows the eroge vn situation type, where, yes there are sex scenes, but they aren’t the main attraction of the game.
Just like Fate, you aren’t going to play it for the sex scenes, those are there which are a nice addiction, but the real stuff is the story and characters.
Playing KS or other eroge games with heavy story telling only for the sex scenes it’s kinda of a waste.
The emotional journey you go through is the real main attraction, that culminates with an h scene only much later, and then you are totally invested.