Our submissive friend and his girlfriend

Warning: Despite the realistic setting, some characters of this story may commit depraved acts such as breaking their friends' trust, cheating, not respecting safe words and (worst of all) handholding. Please understand that sexual activies in real life require high degrees of maturity, trust, respect and consent.

Brief explanation: The story is mostly linear, but is sometimes divided on parallel chapters and there might be some alternate courses of action. You should be able to read it all without the story map. If you are in a hurry and you want to look for very specific scenes, the story map chapter names should also be descriptive - but be extra wary of spoilers!