Izuku was a very happy little boy and he loved his family and they loved him until he was diagnosed as quirkless or so they thought.

Izuku was bullied, neglected, and abused by his family and all of his friends from the ages of 4 through 9, when he ran away.

Izuku: *running* Those bastards don't care... They never did, I'm just a quirkless insignificant piece of worthless useless shit to them! *stops at an a beach* I need to find shelter, it's going to rain soon.

Hanzo Yōshanai: Do you require a place to stay child?

Izuku: *Looks at the old man* W-who are y-you?

Hanzo: I'm Hanzo Yōshanai. What is your name?

Izuku: ... Izuku Yagi... *with a condescending tone* Actually it's just Izuku.

Hanzo: How about you come live with me and my clan? We will feed you train you and keep a roof over your head. We will also never neglect or abuse you, you have my word.

Izuku thought about it for 10 seconds and then he agreed.

Izuku: Let's go before my old family finds out I'm gone.

They both went to the village that Hanzo lives in and he introduced Izuku to everyone in his clan and Izuku bowed in greeting.

Elder: Why did you bring this child Hanzo?

Hanzo: He was neglected and abused by everyone he knows, even his own flesh and blood and I wish to adopt the boy under the radar and train him myself.

Elder: ... *Looks at Izuku* What is your name boy?

Izuku: Izuku sir, but my last name used to be Yagi but I refuse to go by that name.

Elder: ... All Might had another child? Interesting... I agree to your terms Hanzo.

Then Izuku and Hanzo began training together 3 years and one day Izuku met someone from another clan.

Izuku: *sees a girl watching him* ... *coldly* Come out or I'll kill you.

Junko: Oh uhh... *stops hiding* Sorry... I just didn't know who you were and was trying to gather information and train at the same time.

Izuku: It's fine... I'm Izuku Yōshanai.

Junko started bowing like crazy.

Junko: I'm so very sorry sir! I never meant to waste your time master! Please don't punish me!

Izuku: Relax, I'm not your master you baka.

Junko: Yes you are, the Hattori clan serves the Yōshanai clan.

Izuku then walked away from Junko to speak with Hanzo.

Izuku: Father, why did this girl with blue hair call me "master"?

Hanzo: Because she is of the Hattori clan and they serve us, it's been that way for thousands of years Izuku. Her name is Junko btw.

Izuku: *thinking* I'm going to end this servitude even if it kills me.

Years has passed and the Yagi family was still looking for Izuku.

The UA entrance exam was in 10 months and Izuku was ready.