Izuku Yagi was born into a family of heroes but cast aside for being quirkless, overshadowed by his sister's brilliance. Armed with unparalleled intelligence and an insatiable curiosity, he forges a path no one could imagine. From humble beginnings, his experiments transcend human limitations, unlocking secrets of the cosmos. As Izuku harnesses power that defies comprehension, he hides his true potential behind a facade of normalcy. Earth is only the first step in a journey that will reshape galaxies. In a world obsessed with quirks, one boy proves that logic and invention can surpass even the mightiest superpowers.

Most would assume that being the son of two top ten pro-heroes would be an amazing life. Well, it is, unless your quirkless. After being diagnosed quirkless, Izuku Yagi is neglected by his parents in favor of his sister, Izumi. The childhood friends he thought would be there for him not only turned on him. But also bullied and abused him every day. He suffered in silence till the day he learned about who his dad is, and who he decided deserved One for All. After that, he ran away but soon came to realize his quirklessness was a misdiagnosis.

Izuku Yagi was once a bright and happy kid. Until he was diagnosed quirkless. There his life fell into darkness, neglected by his parents, bullied by his sister and ex-best friends. Yet he still hung on to his dream of being a hero, just like All-Might. Until he over-heard All-Might was his dad and stated how he didn't have the heart of hero, yet his bully sister was. Izuku then, accidently ran away, broken by the shock. But while on the street, he discovers something that'll make him a hero. One that saves the kids discarded like him.

Tomura Shigaraki was raised knowing he would kill All Might. He was also raised knowing his Sensei had a son. A quirkless son. Tomura knew he was his Sensei's heir, but his Otouto, Sensei's child, was his Sensei's darling. Tomura would insure his Otouto was safe for Sensei, even if now he's having to fight hero's to do it. Izuku Midoriya was raised knowing he would be a hero, no matter what anyone else said. He was also raised knowing that his dad didn't love him. He was the quirkless child, who would want him? But now he has a quirk, and now he was going to his dream school! He would be the greatest hero ever, even if now he has to deal with an overprotective older brother to do it.

After he turned 10 the boy known as Izuku midoriya changed. The timid and shy boy was gone. in his place was a new Izuku Midoriya. A izuku Midoriya who will do anything to make his dream come true. He will be a hero who will be the light for those who are lost and confused. A hero for people like the past him. His past as deku. He will make it so that the name Deku means a great hero. He will rewrite the definition of Deku. Izuku midoriya will save everyone or die trying. Maybe even save his past self too while he's at it.