"So what happens to all the units I don't find to customize?" you asked vaguely. "And whatever stuff needs to be run for me?"
"Units may be commanded remotely and en masse, including by generalist parameters." the unit stated demurely, cuddling up against you. "Unused units will automatically allocate and perform infrastructure management tasks, through supernatural alterations when necessary or expedient. This includes food supplies and pet care. Former society resources and physical assets may be created or transformed by units at Master's discretion. This includes creating more units, remodeling buildings, vehicles, territory, Master, and celestial bodies."
Remodeling Master? You had an idea there, and stripped naked.
"Unit, remodel me to the external size and proportions of a sexually mature eight year old boy, while maintaining genital size and mental development." you lead. "Make me slightly shorter than average. Give me slightly above average body fat, but not unhealthily, and ensure there's some decent muscle under it while you're at it. Uh, give me control over my arousal levels and refractory period so I can cum as much as I want, whenever I want. Then dress me in a black gakuran-style outfit. I'll make more changes later."
The unit nodded in affirmation and produced the specified clothing as you shrunk down to about four feet tall and had your body composition adjusted. It was a bit curt and oddly not-felt transformation because you didn't intend for anything else to happen. But then you exulted in being able to control your boner remarkably freely. You tossed on the jacket, pants, and shoes of your outfit, deciding to skip undergarments for now. You're the boss.
"Unit, I'm designating you Captain. We're gonna co-opt a nearby school building and make it a school where we can customize our units in groups. Way easier to set up dynamics that way. I'm thinking we have a bunch of shotas play with older men as I come up with ideas for where to put them. Can you arrange it so that groups of unused units that aren't doing anything keeping society running head toward the school? Then have 'em wait in a line outside by class-sized groups? I'm thinking having class-sized groups transform to random descriptions fitting a pattern while we wait, so I have a reserve of generics but some more varied templates if I don't come up with anything."
"Yes, Master." The newly christened Captain said with a smile as the other people in the area began walking toward the school building and assembling in the parking lot. "Arranging unmanaged unit transfer to Dawnport High School. What should routed units transform into?"
"All routed units should appear physically male, but can have a fully functional male, female, or hermaphroditic reproductive system." you lead. "Bias it towards male reproductive systems, but I should be able to encounter at least one of something else every few batches without needing to re-customize. For future reference, all units will maintain masculine or androgynous features no matter the age; the only difference between sexes is reproductive systems. For supporting structures like lactation, activate whenever it would be convenient or somebody's doing it sexually. Female presentation is explicitly performative. Biological functions aren't necessary but are performed for verisimilitude and fun, including sexual fun. All units become hedonistic sluts, willing to perform sex not only with a perfect stranger, but also each other. The appearance of initial hesitancy, struggle or embarrassment is valid, especially for kinky purposes, but it is only an appearance. All units will be willing and consensual: those not initially appearing hesitant or embarrassed will randomly engage in sexual intercourse with other units to provide versimilitude, especially with boys. Units will have individually varying levels of musculature and fat tending toward ideal, but are healthy and acceptably mobile even if the apparent range is obese or underweight. Units will have attractive faces, and high libidos with the sexual stamina to match. Units will have or develop non-sexual interests and hobbies, but will always be ready for a fuck no matter who it's from. Randomize age, race, colors, hairstyles, and publicly expressed personality to provide a range similar to society before I took over the world. But generally make it sexy for me and sexually mature all the younger ones so I can have fun with them. Age up the toddlers-range and below to at least school age for now. Sprinkle in fantasy races and anthropomorphic animals as well. Heck, convert any pets or zoo animals that would grow old or die into anthro units and add them to the processing line. Units age slowly so things don't stay too samey, changing style as needed. Any unit that gets too old or would die reduces their age to that of a random school-age kid and reappears around the school for re-processing."
You pause for a second to think about outfits and culture.
"And I guess... yeah go ahead Captain you can make up some clothes and cultural stylings to dress the randoms while they wait. Preserve the old cultures for show, sprinkled in there randomly for the exotics and transfer student types. But even if they speak other languages they should be fluent in what I speak and not cause any fights more serious than martial arts sparring. I'll sort out staff next."
Captain nodded, as the waiting line began to mold and recolor.
"Pick a few shotas to be primary teachers, I'll customize them later. Pick a few DILFs to be teacher's pets, in the smart, assistant and animal sense as sexy role dictates, generally submissives plus whenever one partner needs an age advantage. Teachers and their pets will take randomized units and have roleplay sex with them in a sexual parody of school life. Theme the classes mostly after major kinks and stereotypical roles. Leave in a few general purpose ones in case the mix is its own style, then have lunch and a club period after school be where they can mix freely. Use a few of the houses around the school for the teachers, pets, and students to hang out and have off-hours. Then after a few days if I don't do anything special-order to that batch of random units, the teachers customize them to fill positions around towns for verisimilitude. Like, gradually inhabit these other local houses and nonessential businesses so I can just walk around and find pre-made fuckboys in our new society wherever I want. Then move onto the next batch. Captain, follow me around so I can talk to you when I feel like it."
"Got it!" Captain said cheerily, following you down the street as you walk towards Dawnport. Already the units that were near the school before had become the first few batches of transformed boys and men.
"Alright, I'm Principal of Dawnport High now." you said, fluffing up your jacket for the vibe and striding inside. "Let's inspect what we're gonna teach these dudes."