In this day and age most of the shinobi of old had perished and so did their knowledge of chakra, but one certain Uchiha lived.

Izuku Uchiha was the great great grandson of Sasuke Uchiha of the leaf village.

He was born quirkless in a world of quirks, he had no intention of being a hero, in fact he despised heroes and their corrupt society.

Izuku was bullied until the bullying caused him to unlock his Sharingan and he beat his bullies to a pulp.

Izuku instead of being a hero was sold by his mother to a Shinobi and became a freelance ninja/bodyguard and he loved his job.

Izuku was walking home from a job when he saw a girl being attacked and he stepped in and beat the hell out of the three attackers of the girl.

Izuku: Damn cowards... Are you alright miss?

Momo: I'm quite alright thanks, would you like to come to my house so my parents can thank you?

Izuku walked with her to her home and they walked into the house and Momo introduced Izuku to her parents.

Mr. Yaoyorozu: Thank you so much for saving my daughter, you have no idea how grateful I am.

Izuku: No problem, although since you are the Yaoyorozu family I was wondering if you had an opening for a bodyguard?

Mr. Yaoyorozu: You could be Momo's personal butler, is that acceptable?

Izuku nodded and shook hands with Mr Yaoyorozu and said "I will be here on Thursday."

Time skip to Thursday

Izuku arrived in his best attire and. Greeted the family and went to bed as it was late, his room was next to Momo's.

The next morning Momo asked Izuku to take her to school and Izuku agreed, they then walked outside and she saw no car.

Momo: Izuku, how am I getting to school?

Izuku: Susanoo.

Then a giant green humanoid with wings made of chakra appeared with them inside and flew away.

When they arrived Momo went to her classes and had an overall good day, when school ended Momo and her friend Jirou were waiting and then a 1969 Camaro pulled up and Izuku came out.

Izuku: Good afternoon Lady Yaoyorozu, Ms. Jirou.

Jirou: Who's the pretty boy?

Izuku bowed and said "My apologies ma'am. I am Izuku Uchiha, Lady Yaoyorozu's personal bodyguard."

Jirou nudged Momo and started teasing her, causing Momo to blush. Izuku saw this and chuckled a bit at her friend's antics, Momo apologized and Izuku said "It's fine, I'm used to it." This confused the two girls.

Izuku saw the confusion and said "Your mother has been hitting on me all day today, so I'm pretty much used to it." This made Momo upset, but she didn't show it.

They went to Jirou's house and Izuku met her parents, who had a talk with Izuku while the other two studied.

Mr. Jirou: So, how old are you Mr...?

Izuku: It's Uchiha, Izuku Uchiha and I am 19 years old.

Mrs. Jirou: 19?! How are you a bodyguard?!

Izuku: Well ma'am, that is a story I don't like to tell... But I will since you will trust me more...

Izuku then explained how he was quirkless and was bullied and was sold by his own mother.

Mrs. Jirou was crying and Mr. Jirou just looked shocked at what he had heard, then Izuku said "And before you ask, yes I have killed people... 268,000 people to be exact."

After awhile Izuku took Momo home and Momo went to bed, but Izuku went outside and looked up at the starry night sky.

Mr. Yaoyorozu: It's unwise to skip on sleep, Izuku.

Izuku: I know, I'm just reflecting sir.

Mr. Yaoyorozu: What are you reflecting on?

Izuku: My past...

Mr. Yaoyorozu knew what he meant and left him to his thoughts.

Izuku thinking: Why am I so heartless? Why do I blame myself for Obito's death?

Izuku closed his eyes and imagined his friend before he died.

Izuku then went to bed and had a nightmare about him killing his  girlfriend.

(Imagine she says Izuku)