My head canon is that this VN is set in an acting universe where every character is a porn star/actor/actress, and the main character is only just starting out and this is their first day. And the reader is the director of this porn movie. Each route just caters to a different audience
And that everyone you meet is actually super nice and professional. Some stuff is just VFX magic like the "dumb rubber" or "fertile flora" ending. A bit of editing and practical effects but it's still Marco getting it on with these different people CONSENSUALLY.