One popular story could be 'Izuku's Harem Adventure'. In it, Izuku might find himself in various situations where he gradually forms a harem with different characters from the 'My Hero Academia' universe. Each character brings a unique dynamic to the story, like Ochaco's bubbly nature or Momo's intelligent charm.
In My Hero Academia Izuku Harem Fanfiction, the 'accidental closeness' trope is quite prevalent. For example, Izuku might accidentally fall on one of the girls in the harem, leading to an embarrassing yet cute moment. There's also the 'rivalry - turned - love' trope. Some of the characters who initially see Izuku as a rival might later develop feelings for him and join the harem.
In 'Boku no Hero Academia Izuku x Harem Fanfiction', a popular trope is the 'fish - out - of - water' situation. Since Izuku is suddenly surrounded by a group of girls interested in him, he may find himself in awkward or unexpected social situations. Also, the 'shared secret' trope can be seen. Maybe they all share a secret related to their quirks or a hidden mission, which binds them closer together as a harem. Additionally, the 'jealousy' trope is often present, with the harem members getting jealous of each other's time with Izuku.
In fanfictions, Mina Ashido might be in Izuku's harem. Her energetic and fun - loving personality could add a lot of color to the harem. Jirou Kyoka could also be a potential member. Her musical quirk and her somewhat reserved nature could create an interesting contrast with Izuku. And then there's Toru Hagakure. Her invisible quirk and her friendly personality could make her a unique addition to Izuku's group of love interests.
In these fanfictions, Izuku often develops more confidence in his relationships. For example, he may start off shy around the girls in his harem but gradually become more assertive. This is because the support and love from his harem give him an extra boost.
There's also 'Izuku's Harem Adventure'. In this fanfiction, the author creates unique scenarios where Izuku finds himself in the middle of a harem. It has great character development for not only Izuku but also the members of his harem, exploring their individual personalities and how they interact with Izuku.
Ochaco Uraraka is a common character in the harem. Her kind and friendly nature makes her a likely candidate. Momo Yaoyorozu is also often included. Her intelligence and elegance add an interesting dynamic to the harem. And Tsuyu Asui could be part of it too, with her unique personality.
One popular example could be those where Izuku is betrayed by his classmates. Maybe they believe false rumors about him being a traitor. Another might be a story where he is betrayed by the hero society at large. They could turn on him because his power is seen as too dangerous or unpredictable.
One popular plotline is Izuku and Tsuyu teaming up for a challenging mission at school. They use their unique quirks in tandem to overcome obstacles. For example, Izuku's super strength combined with Tsuyu's frog - like abilities like her long tongue and ability to climb walls can make for an exciting adventure. Another plotline could be a story where they have to help each other grow as heroes outside of school, facing real - world problems and learning from one another.
Another theme is power - up in relation to relationships. Sometimes, the support from his harem members helps Izuku grow stronger in his hero - related abilities. It shows how his personal life can influence his development as a hero.
Another good one is 'The Izuku - Tsuyu Team - Up'. In this fanfiction, they are paired up for a hero exercise that goes awry. The story is filled with action and also some really sweet moments between the two characters. It shows how they support each other and grow as heroes together.