There's a fanfiction called 'Izuku and Momo: The Road to Love'. It focuses on how their different personalities complement each other. Izuku's determination and Momo's intelligence create a unique dynamic. They support each other in their hero training and slowly fall in love. It also shows how they deal with the opinions of their classmates regarding their relationship.
One interesting fanfiction could be 'Izuku and Momo's Unlikely Bond'. In it, they might start off as study partners, gradually realizing their feelings for each other through shared challenges at school. Another could be 'A Blossoming Love: Izuku and Momo' where they are paired up for a hero mission and during that time, their relationship deepens.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, and you're likely to find many about Izuku and Momo's love story there.
A popular adopted Izuku fanfiction is 'Adopted by the League'. In this rather unique take, Izuku is adopted by the League of Villains. It flips the script as we see Izuku's perspective change and his understanding of the hero - villain dynamic is challenged. It's a fascinating exploration of what could happen if Izuku was on the other side of the law, at least initially.
One interesting izuku adaptation quirk fanfiction could be where he has a time - manipulation quirk instead of One For All. In this story, he might struggle to control the quirk at first, constantly skipping forward or backward in time accidentally. This would create a whole new set of challenges and storylines for him, different from the original manga.
One interesting izuku book quirk fanfiction could be where his quirk is related to the power of words from books. He can summon things or gain abilities by reading specific passages. For example, if he reads a passage about flight, he can briefly fly.
One interesting izuku ninja quirk fanfiction could be where Izuku uses his ninja - like quirk to secretly protect his classmates without them knowing. His stealth and quick - reflex skills from the quirk would make for some exciting scenarios.
There's a fanfiction where Izuku has an ancient quirk related to prophecy. He starts having visions of the past and future, which he uses to prevent disasters and help his friends in the hero academy. It adds a really cool twist to his character.
One interesting izuku transmutation quirk fanfiction could be 'Izuku's Alchemy Adventure'. In this, Izuku discovers a transmutation quirk that allows him to transform elements in unique ways, like turning water into a solid shield for protection during battles.
One interesting izuku system quirk fanfiction could be where Izuku's system quirk allows him to access the powers of different heroes throughout history. He could use these powers in unique combinations to defeat villains in ways no one has seen before.
Another great 'One Punch Izuku' fanfiction could be set in an alternate universe where the One Punch power is a rare quirk. Izuku has to hide his power at first because he's afraid of being ostracized. The story could then focus on his journey of gradually revealing his true strength and changing the perception of what it means to be a hero.
Some fanfictions explore the idea of Izuku's sentient quirk being a bit mischievous. It could play pranks on him or get him into awkward situations, while still being a powerful asset in the hero world.