"I knew the power of a single wish, after all. Invisible and Inevitable, like a butterfly beats its wings in one corner of the globe and with that single action changes the weather halfway across the world."
Alice Hoffman
A single beating wing of a butterfly changes the course of history as we knew it, In one timeline we see a small powerless green haired boy struggle his way through life and his desire to become a hero, eventually meeting his idol who gifts him a quirk allowing him to become the hero he was meant to be.
However with the help of a wingbeat this story begins a year earlier when a recent graduate of UA Highschool was on his way home, passing through Mustafu prefecture on his way to his newly bought apartment. Shota Aizawa, a fresh underground hero, was walking home when he heard some noise coming from an alley, jumping up to the nearest rooftop he looked over the edge into the alley where he saw a green haired woman around his age being bothered by a man.
Suddenly the man activates his quirk which turns his arm into a knife holding it dangerously close to the woman's throat yelling something about handing over money, activating his quirk causing the man to look at his now returned hand, Shota jumps down on top of the man knocking him into the group and unconscious.
Stepping off the man's body Shota dusts himself off before turning to the woman who was standing there staring at him with a look of awe on her face, "Are you alright miss?" he asks, the woman lounges over at him tackling him into a hug and starts to cry into his shoulder, "T-Thank you s-so much mister!" she exclames through her tears "You saved my life, how will I ever repay you". Shota responds "It's ok you don't have to do that. I'm actually a new pro hero who just recently started working underground so saving people is what I do Miss…?" "Inko Midoriya" "Miss Midoriya my hero name is EraserHead but my name is actually Shota Aizawa" "Thank you Mr. Aizawa but there must be some way I can repay you" "If you insist you can allow me to accompany you back to your home so I can ensure you arrive safely."
The two young adults walked in comfortable silence back to the apartment of inko Midoriya, just as they reached the door to the apartment Inko turned to Shota handed him a sheet of paper, he looked at it and saw there was a phone number printed on it in cute handwriting, As Inko opens the door the turn back to him and says "If you ever want to hang out give me a call!"
With a small smile to hide his blush Shota slips the paper into his pocket and continues down the road to his apartment.
About 2 days later Shota was lounging around his apartment with nothing to do when he remembered the number that Midoriya gave him and decided to give her a call. After a quick phone call they agreed to hang out today at the park before Shota's patrol that night. They had an amazing time together and realized they got along really well and decided to hangout again sometime soon.
After plenty of friendly get-togethers Shota finally asked Inko on a date which went extremely well and they decided to start dating. After years of dating Shota finally worked up the nerve to ask Inko to marry him, the ceremony was small with a couple friends and family from both sides.
A week after their honeymoon Inko announced to Shota that she was pregnant after taking care of Inko and their unborn child for 9 months. The time was finally arriving for Inko to give birth.
Shota and Inko jumped into Shota's car and raced towards the hospital where Inko was rushed into the delivery room followed by Shota, and after 5 long hours the baby named Izuku was born, however this is where the happiness ended and just after the birth Inko developed a clot in her blood from the high blood pressure of giving birth resulting in her eventual death. Shota was devastated and after a quick but heartbreaking funeral Shota is left to raise baby Izuku all on his own.