The acquisition of a quirk on his 4th birthday changes the course of Izuku Midoriya's life Watch as backed by his parents His mentor and his quirk Izuku becomes the most powerful hero the world has ever known This is his story

An accident in Athena's lab, causes Kaen, Mina, and Eri be separated in another world. There Kaen and Mina meet a slime, who they find they have a lot more in common with then they would think. The adventure begins, as they join Rimuru in a world of fantasy and magic. (Saiyan Heroes of U.A Spinoff.)

Izuku summons Rimuru Tempest and receives his powers. My Hero Academia/Tensei Shitara Slime Datta Ken That Time I Got Reincarnated as a Slime (Plotbunny)

Izuku reincarnates into a slime after dying at the hands of the Sludge Villain. My Hero Academia/That Time I Got Reincarnated as a Slime (Plotbunny)

Rimuru appears in the world of heroes. After being forced to join the U.A. through All Might, he finds himself at the centre of the Heroes and Villains society.

Changing the past was what Chloe had attempted doing & failed at countless times before finally managing to succeed in the manner she wanted to. However preventing a certain event from happening could always come with unexpected consequences that you could have never expected. Chloe's success result in massive change in her original world & her childhood friend Izuku Midoriya too

For all his childhood Izuku wanted to be a hero and nothing else. When his quirk manifested he realized that dream could become true, but he never could've predicted that he was meant for a much bigger role. One decided for him by a power beyond imagination.

Izuku never thought that his life would end so soon, dying before he could become a full fledged hero like All Might. But, this wasn't the end for him. Waking up in a new world, and with a new body; he discovers that his dream of becoming a hero hasn't died just yet. This time, he'll become the hero and leader that he was always meant to be. (Rewrite of the original)

Aoba Kiseki was five when his hair turned blue, his eyes gleamed gold, and a voice started talking in his head. (Or, Rimuru gets isekai'ed in another world. Again. At least he's not alone)

Rimuru landed on Earth, but it is in the future and is filled with superpowers and anomalies! As you all can guess, he attends UA, but as a teacher or student, you'll have to read to find out! ;P

Rimuru Tempest and her friend Milim Nava have just joined U.A. High School, or more specifically, Class 1-A! Making friends with the other members of the class such as Izuku Midoriya and Mina Ashido has increased their confidence, but they are ill-prepared as dark forces such as the League of Villains and their allies prepare to incite some chaos...