At some point in his late teens, Noctis suffers an affliction (injury or illness, I leave the details to Authornonny) that leaves him confined to his bed for an extended period of time. Knowing that the prince will be stir crazy in a matter of weeks, Ignis and Gladio start sneaking Prompto into the Citadel to provice Noct with some company.

Prompto, seeing how miserable his friend is withthe circumstances, tells him a story off the top of his head to cheer him up. Turns out Prompto is really good at telling stories.

Tldr fluffy version of 1001 Arabian Nights, minus the whole threat of execution thing. And also with 100% more Prompto Brand Insanity.