Unice5656 proposes a sci-fi universe with an elite espionage agency who have portable teleportation devices that are limited to 150kg (330 pounds) and therefore require their agent pairs (and their equipment!) to fit strictly within this mass limit. Enter one very tall character whose only chance at joining the agency comes around when the lightest recruit to ever pass the qualifying exam appears. Unice5656 and Aetheo have way too much fun fleshing out the idiosyncrasies of a world where making things ultra-light is paramount.