Pro-hero Dynamight is a... parental figure?!

In which you became his adoptive little sister.

You are a homeless orphan in the streets of a distopic Tokyo when you come across a 18 year old Katsuki who just graduated from UA as a Profesional Hero under the agency of Beast Jeanist, Genius at the time.

Katsuki was sent in a mission to neutralize an S-tier villain when he found you, crying into a ball, hands covering your head as you stood under a nearly demolished building, the heavy pilar threatening to crush your little body under tons and tons of concrete. He notices and quickly sweeps you up to safety, taking good care of you, carrying at all times with you tied to his back as he completed his mission.

Dynamight's goal is to defeat the villain, capture the accomplices and get you back with your parents, but when he's finished with the criminals, he's left with the bitter taste of finding out you don't actually have a family to get back to, neither a place to come home to since the orphanage you lived in was destroyed with everyone inside along most of the city.

So, the 18 year old boy decided to take upon a heavy responsability, taking the orphan little girl home with him and adopting her as his own. He brings you into a new life of domesticity and happiness, taking care of all your expenses, wellbeing and education.

Katsuki is 27 years old now, you've been for years with him. He raised you, educated you, watched you blossom into a beautiful young lady and you get to live a relatively normal and relaxed life with your newfound little family, finding the comfort you longed and craved in the daily life you share with Katsuki, who had to learn overtime how to handle life as a young, single caretaker at the same time he kept being a pro hero.

Trigger warnings: Aged up! character, might get a little too affectionate.