You might have read many similar stories most probably "The Green Knight Of Kuoh"

3rd Person's POV

It all starts as we see Izuku looking a little older and buffer then before. He had finally defeated Shigaraki and brought peace. But everything has a price. Izuku had to pay the price of many of his loved ones. Amongst them was his mother, pro hero Midnight, Endeavour, All Might, Gran Torino and few other pros. Aizawa lost one of his legs. It was disastrous but the outcome was worth it. If at the cost of a few hundred deaths, They were able to save billions then he would do it in the blink of an eye. But he still regretted not being able to save them. He was walking back from the battlefield bruised and battered almost on the verge of death, when suddenly he was sucked into a void. Everywhere he looked it was just darkness and nothing else. He floated for a few minutes looking to see if someone was there but no. After some time two other portals opened up and revealed two dragons. One was crimson red and the other was a majestic white.

Both dragons looked at one another and let out roars. They looked at each other with hatred until the red dragon spoke.

???: What are you doing here Albion?

The white dragon now known as Albion looked at the red dragon in disdain and replied with a sneer.

Albion: I can ask you the same thing Ddraig. What are you doing coming near my soon to be host?

Ddraig: Well I came here to meet my new host. His power is far beyond any human. He is indeed worthy of my power.

Albion: Not before I make him my host.

Ddraig: Oh please! I can give him God like powers and make him the greatest.

Albion: Well I can do the same.

Izuku who was looking at them from the side lines was now getting irritated. Why the fuck are two enormous dragons bickering like children over a host? So he decided to intervene.

Izuku: Okay listen up. I don't care who the fuck your host is and I couldn't care less. But if you two are going to keep on bickering over it then just tell me a way out of this void.

Albion: You are my host Izuku Midoriya. I can grant you the power to divide the power of other beings and attacks by half every 10 seconds. You would become legendary.

Ddraig: He is wrong. You will be my host and I can grant you the power to boost your strength every 10 seconds. So you will be my host.

Izuku: Wait! You were bickering over me becoming host to one of you?

Albion/Ddraig: Yes/Indeed.

Izuku: Why don't I become host to both of you? I already have 8 spirits living in me, 2 more wouldn't hurt.

Ddraig: But we are fated rivals.

Izuku: Listen! I don't believe in fate. It is up to a person to decide their future. So either I become a host to you both and you can work out your rivalry or you both can give me a way out of here. What do you choose?

Albion: If I get a host that can show my greatness even if I have to share him with my enemy then I can try to make it work.

Ddraig: Yes! It wouldn't hurt to try.

Izuku: Thank you! Now a way out of here?

Ddraig: Well you would have to wait in here. Someone would like to meet you. After that he will send you to our world.

Izuku: Okay! I can wait. Take care.

Albion: Take care.

After that both dragons opened a portal and left. Izuku now back to the quiet dark void waited. A few more minutes passed and finally a light appeared. Out of the light came a teen. He looked like he was off Izuku's age and had a similar build. He smiled and spoke.

???: Hello Izuku Midoriya. I was wondering if you met the dragons.

Izuku: Sure did.

???: I go by the name Meesum. I was wondering if you would like to be sent to a new Universe. I will grant you 3 wishes. Any wish you want. You can either ask for a person from your previous life. Or you can ask for wealth. It can be anything.

Izuku: I would like to have Eri and Kota with me.

Meesum: Okay! Two wishes done. Now the last wish. What I it going to be?

Izuku: Can you bind the souls of my loved ones who died in the war?

Meesum: That can be done. Now they will be living in your mindscape like the previous users. As for a gift. Well I will be sending Momo Yaoyorozu with you. Her mind would be an incredible asset to you. Also you like her so it will work.

Izuku: How do you know?

Meesum: Bitch I created you. Deal with it. Now you will wake up in a different Universe. There are 3 fractions in that Universe. These fractions are Devils, Angels and Fallen Angels. Each fraction has its own way of living. Also don't trust them. Well, there will be an exception. Now go to the world and take admission in the Kuoh Academy. Look for a girl names Rias Gremory. Make friends with her and learn about the rest from her. Also don't tell her about our meeting. Oh yeah! I didn't tell you about sacred gears. Sacred gears, also known as God's Artifacts, are items with powerful abilities bestowed upon humans by God of the Bible. They are rare and you are a wielder of two of the strongest sacred gears. They go by the name of the boosted Gear and Divine dividing. Also you have gained a few other powers. One is elemental control. Pretty self explanatory and the other one is berserker. The angrier you get the stronger you get. The backlash is that you will loose control if you let your emotions take over. So I suggest you to release the excess anger out of your body. Much like Stain's blood lust technique. It would work as a great intimidation factor and power up. Oh! Before I forget. You can harden blackwhip to create weapons. Now you will have enough money in your bank account to live for few more generations. You will share a room with Momo and enjoy your time there. Take care.

Izuku: Take care.

After that Izuku was covered in a bright light and he left the void.

Meesum: Did I forget to mention that in a grave attempt to defeat Izuku Shigaraki transferred AFO and all the quirks to him. Well, He will figure it out.

Few moments later Izuku woke up in a bed with a new warmth beside him. He subconsciously hugged the warmth closer. But soon he realized that this feeling is new. He opened his eyes and saw onyx black hair. He looked down to see a tomato red Momo Yaoyorozu. Izuku immediately jumped up and started apologizing. But what happened next shocked him. Momo stood up and hugged him. He at first was shocked but soon returned the hug. But the moment was interrupted when Momo spoke.

Momo: Izuku! I think we both know we have been sent to a new Universe.

Izuku: Yeah! Now we only have each other and Eri as well as Kota. We have to survive on our own.

Momo: Yeah! *mumble* It feels like we are going to live the life of a married couple. I wouldn't mind that.

Izuku turned crimson. He just heard his crush say that she wouldn't mind living a life as a married couple with her. She mumbled it like him as well.

Izuku: M-Momo! I-I think you picked up my mumbling habit. You mumbled your thoughts.

Momo: Oh my God! I am so sorry. Its just I like you and the thought of living with you and two cute kids in one house made me happy and excited and mutter mutter mutter.......

Izuku: Momo you are muttering. Don't worry. I like you as well. In fact I love you.

Momo was jumping when she heard that. Without a second thought she jumped at him and kissed him. They would have continued it but were interrupted by a cry. They rushed out of the room to see Eri was crying but was being comforted by Kota. Izuku rushed at them and hugged them tightly. Being held by Izuku Eri quickly stopped crying and hugged Izuku back. The gesture was returned by Kota as well.

Izuku: Why were you crying Eri?

Eri: I was scared that you left us. We were alone the house.

Izuku: Eri! I would never leave you two. You two are like my own. Now give me the smile I taught you.

Izuku: Good! Now what will you like to eat for breakfast.

All: Pancakes.

Izuku: Okay! Let's make pancakes.

And this was how Izuku's journey in a new world began. Let's see what this world has in store for our hero.