Saitama is a very powerful hero in the One Punch Man universe. He can defeat any opponent with just one punch. He has a simple appearance and a somewhat laid - back personality.
First, you need to create a well - developed OC (Original Character). Think about their personality, backstory, and what makes them unique. For example, if your OC is a hero, consider their powers and how they might interact with Tatsumaki's abilities. Then, plan the plot. It could be a love story, a friendship - turned - rivalry, or a team - up adventure. Make sure to keep Tatsumaki's character traits in mind, like her pride and powerful psychic abilities.
She is often portrayed as extremely powerful. Her psychic powers are usually magnified in fanfiction, allowing her to perform even more incredible feats. For instance, she might be able to move entire cities with her mind.
First, understand the characters well. Saitama is a very simple yet powerful character, and Tatsumaki is complex and prideful. Try to capture their essence. Then, for the lemon part, be tasteful. Don't make it too vulgar. You can use their relationship development as a build - up to any romantic or physical moments. Also, set a good plot. It could be something like they have to team up against a new threat and during that time, their feelings for each other grow.
One interesting Naruto and Tatsumaki fanfiction could be 'The Unlikely Alliance'. In this story, Naruto's positive energy and Tatsumaki's strong will collide in a world where their universes are somehow merged. Naruto tries to understand Tatsumaki's often prickly nature while Tatsumaki is initially dismissive of Naruto but slowly comes to respect his abilities.
The themes usually include power dynamics. Since Saitama is so overpowered, fanfics often explore how Tatsumaki, who is used to being one of the strongest, reacts to someone like him. Also, friendship or comradeship is a theme. Despite their differences, they might find common ground and work together. There can also be a theme of self - discovery, as they might learn something about themselves through their interactions.
A common theme is the exploration of their relationship. Given their different personalities, fanfictions often play with how they interact, whether it's in a comical way or a more serious, character - developing way.
Friendship or a sort of reluctant alliance is another theme. Given their different personalities, seeing them come together and form a bond, whether it's a full - fledged friendship or just a temporary partnership against a common enemy, is a popular plot point. It can be really interesting to read about how they gradually get to know and trust each other.