No, you’re not entirely right. The main story is only slightly influenced by the NSFW scenes. I get that it might be hard to understand how in a game like this the adult content isn’t the main focus. But for me, the story itself is the biggest motivator behind creating something.
Here the plot is a bit deeper than just sleeping with someone. The shark girl isn’t “someone” from the real world. I’m only inspired by the character’s image and personality, with full respect and care for the character itself.