Chapter 1: Prologue
"Your son has a very... interesting quirk Mrs. Midoriya." The doctor mumbled to the shocked parent and child.
"What do you mean by that?! What's his quirk?" Inko was worried. It seemed like her baby Izuku didn't have any power to speak of, and the doctors hesitation didn't make it any better. "It seems that your boy has the ability to, shall I say, control the activity and functions of his genitalia." There was a silence that permeated through the room. It seemed to echo out of the sound proofed walls that were made specifically for privacy.
Suddenly, a loud "WHAT" was heard. Inko jumped from her chair and made such a ruckus that Izuku would have been scared if he wasn't already passed out from the scream.
The doctor was of course used to such reactions. "Please Mrs. Midoriya let's wake up your son and I will explain."
"Your son has the ability to, as I said, fully control his genitalia. He can regulate the production of semen, as well as make himself sterile or more virile. He can grow or shrink his endowment, which by default will already be a good amount larger than average. That is only based on the preliminary exams, he may be able to do more. From the tests however, it seems as if his body is accelerating his growth to accommodate the needed blood and hormones for his quirk to function, so he may also have an easier time gaining muscle, but that is just a guess."
Inko drove home that afternoon shocked and, in the very back of her consciousness, slightly aroused.
Izuku was incredibly confused. He didn't know what any of what the doctor said meant. He was 4 for kami's sake. All he did know, was that he didn't have any impressive power, and whatever his quirk was, wasn't meant for hero work...