"Ok, let's assume I believe you. If I'm your master. Kiss each other." If this was a prank by some school they would refuse on the spot clearly, to your surprise they started to move among each other locking their lips, and you could swore they were using their tongues, still they merely lean on each other and after finishing moved to the next one. "The hell?" You start getting uncomfortable among all the naked youth kissing quickly while you are distracted you make your way out of your room and go downstairs, partly to escape, partly to verify that damned box.
However right in the dinning room there stood five other naked boys, One was a tall and slim albino devoid of body hair, the second was a smiling boy of his height, similar built and brown hair, the definition of cute. The third was a built teen with a broad upper torso, curly black hair and interestingly the only circumcised of the bunch, the fourth looked like an asian average guy, maybe a bit taller than you, but otherwise unremarkable, he had spiky black hair and a 4 inch pecker. The last one was had brown skin, it looked like a fit jock with a fine facial hair and the hairiest of the bunch, with a healthy bush, chest hair and hairy pits.
And without fault when they saw you they all knelled and in unison declared: "Master"
"Ok someone need to explain what the hell is going on!" you demand, and the albino rise up and look for something in the small wooden chest, he then gives you a small and old notebook.
"Our old master said that it held all your answers."
You take the small notebook, and as you read the five before you continue to look at you. Keeping an eye on them you read.
This are homunculi, the book says, artificially created humans, your grandparent had managed to create them, however once created they are bound to an individual from which they can feed on his/her psychic waves and once bound they would follow its commands, on his notes you see that although they have no will of their own they still developed personalities and identities, and how they can be transferred to another human. "Well that resolves that I think... but why are you naked?"
"We... were naked." one of them ventured clearly not knowing how to reply. It became painfully obvious that if they were indeed the nude figurines, they weren't going to sprout clothes out of thin air. You return to your reading, and see the spell to turn them back into the little statues... and it looked awfully complicated, you continue to peruse, you see a spell for soul exchange between human and homunculus, how to create homunculus... and other things to do about them.
"Ok, you are homunculuses, but what do I do with you? My parents are going to flip when they see you."
"Whatever you like."