Note: when Izuku first used his Sharingan, it was only a first step Sharingan, huh. He ain't just gonna get the Eternal Mangekyō right at the beginning. Izuku hasn't talked about his quirk at school too, so the school still thinks he's quirkless.

Time skip

On this magnificent friday morning, the teacher just entered the class. Everyone was talking, chatting left and right, until the teacher began to speak.
"Well, i was about to give you these papers for your future projects, but..."
She then proceeded to throw them up in the air.
"You all wanna be heroes right!"
All the class, besides Izuku and Katsuki, began to show off their quirks.
After a few seconds, Kacchan stated: "Yo teach! Don't lump me and Izuku with all these Extras!"

"That's right, you and Izuku applied to UA, huh?"
The class then began quieting up.
"I mean, Katsuki is really intelligent and has a strong quirk, but Izuku... pfft!"
Katsuki began tensing up.
"Katsuki definitely can. Izuku has high grades too but his quirklessness is just throwing him off bounds."
Katsuki has his blood rising.
"Izuku? This quirkless freak? Don't make me laugh!"
Katsuki wanted to stay calm. But something snapped. He began jumping across his desk to the third extra, as he'd call him, only to be stopped by Izuku, or, as he'd call him², Deku.
"Don't, Kacchan. I'm okay. Everything is going to be okay" Izuku said, staying calm. He got used to all this bad-mouthing towards him and his now gone quirklessness. Well, basically it's not a quirk but it's still some kind of superpower.

"Okay then. But, if you need help beating him up to a pulp later, call me."
"Calm down Kacchan, you really need to manage your anger."
"Huh, who do you think you are?! Just kidding. You're right, i guess. Although that doesn't mean i'm wrong, so i'm ok with it."

Little time skip

They were now exiting class. Izuku finished writing about the new Pro Hero Mt Lady in his Quirk Analysis notebook number 13, while Kacchan was waiting for him on the doorstep. When they began walking out of the school, Izuku stated: "Hey Kacchan, i think we need training. I mean, we may have some pretty strong quirks, but we shouldn't rely on them too much."
Izuku smirked.
"Damn, you're right again. And look at that smirk, that means you have something in mind. Praytell Deku, what have you been thinking about?"
Izuku giggled a little.
"You know me too much, Kacchan." He sighed. "There's this beach near where we live that has just been a dumpster for people these past few years. If we can manage to clean it up before the entrance exams, we'd surely gain some muscle and level up our quirks."
"You mean Dagobah Municipal Beach?"
"Yeah, that one."
"Well then, when do we begin?"
"7:30 tomorrow."
"Pm i hope... Although your literal everything is screaming am."
"You bet it'd be am! There's no time to spare! Have you ever seen how much garbage has actually been dumped these past few years? People are horrible, let me tell ya!"

At this point, they reached Izuku's house. It was now his time to depart to his mother.
"Well then Kacchan, see you tomorrow!"
"You better send me some of your best memes. How can i be pumped up without some spicy, yet refined memes?"
"Alright, plus i have some fresh stolen memes holding so much power. I'm going to make sure you receive them by tomorrow."

They then exchanged byes and waves, before Izuku stepped in his house. His mother heard it and immediately exclaimed: "Welcome back Izuku! How has been the day?"
"Pretty much perfectly, mom. By the way, the UA entrance exams are in only 10 months and i'd like to train with Kacchan all day on weekends and maybe some other days to ready ourselves."
"To train, you'll need energy. Extra-large Katsudon it is, then."
"Gawd mom yes please i'm already drooling!"
Inko then got up and went to the fridge.
"I'll call you when it'll be ready, for now and tomorrow go relax in your room."
"Okay, love you!" He waved.
"Love you too honey!" She waved.

Izuku then entered his room, emptied his pockets, changing up in some more comfy clothes that are a black unzipped vest and his underwear. You don't need much to be comfy.
He then plopped down into his chair and began playing some RoBeats, while chatting with some friends via Discord. After 1 little hour, he stopped playing and began drawing on livestream for his fans, with a calm yet catchy music (at the top. the video is named Special_Effects.mp4 and the music is Vitamins by Barac). That nigga got some clout. A little half an hour later, his mom called him for dinner.

He came down, put some plates and cutlery for him and his mom, before serving the two and began eating, along with his mom.

Little time skip

Izuku went up to his bedroom, began chatting online a little more with his community on Discord before going to bed.
He plopped into his bed, phone in hand, sending memes to Kacchan, like the one at the top. Izuku wasn't a normie. One of the things making him popular was his knowledge in memeology.
He then fell asleep, deep into his faraway dreams. Or in this case, may i say, not so faraway vision.

What he saw amazed him. It was like a huge screen, containing a lot of littler screens. In each little screen, he could see the man he saw in his first vision, now known as Sasuke Uchiha, using a different technique. On some screens were even people that he didn't know, but has that particular red eye, glowing in the dark night. Although, each one of these different personas has their pupils in a different shape from each other. In two screens, he recognized the fireball he first subconsciously sent to the sludge monster back then. In one of the two screens was Sasuke, but in the other he didn't know, although this persona was very recurrent. He had long hair that attained his shoulderblades, tied up in a little kind of ponytail. Two distincts lines on his faces, giving him more of a menacing ゴゴゴゴ impression when he was wielding a serious face. But, more importantly, he had that peculiar and very pretty extra long black vest with red clouds that covered most of his body. He was intrigued. He then heard footsteps. He did a whole 180° turn to face where the footsteps came from. He then saw Sasuke, with his eyes in a shape he has never seen before.

Then, his right eye shot open, bleeding, while his left one closed down, and Izuku could feel himself burning, before everything became white, and his eyes shot up, bloody.

Izuku picked up a paper towel from the pack on his nightstand and began wiping the blood off. The streets were surprisingly dark, yet well lit outside his window. Izuku then decided to look at the time, when he saw it was only 4am. Why did it looked like it was daytime then? He didn't know.
Then he noticed. He knew the light in his room was switched off for two reasons. The first one being that his mother wouldn't switch on the light for no reason. The second being that the lightswitch was pressed on its higher part, meaning it was off. Yet, he saw perfectly. And everything he saw, had something particular. It was like looking with the Sharingans on, but... It was better. He then got up, went up to his bathroom, and looked into the mirror, and all his curiosity was now being changed into excitement. There wasn't 1 black droplet anymore, there was 3. His cheeks still beared some red lines from his dry badly swiped down blood, but he didn't care. His inheritage. His eyes. His power. It evolved. It hurts, but he became stronger.

Besides, this dream. It pained him. Sasuke Uchiha, his presumed dad, killed him. It pained him so much. He never really knew his dad. But when he found out the potential dad, who has 85% compatibility with Izuku, it was in a dream, and it was only to be killed by him. By his owns... Eyes. The peculiar eyes that he inherited of. He felt sad. Really sad.
But what he didn't knew is that he'd come across this exact same dream in the near future, and more than once.

Author note

I finally find the drive to write, so i made this ~1.4k words second chapter. School is coming back soon, precisely Wednesday at 2pm, eastern time (i live in western Europe). I may be able to get you 1 or 2 more chapters until then, but nothing is promised. As some people may know, i'm a busy man. And if i'm a busy man without school, what will it become with it! I just want to be commit died.