One idea could be that Saitama and Tornado are forced to team up for a special mission. Maybe a powerful villain has emerged that requires both of their unique powers. Saitama's raw strength and Tornado's psychic abilities would make for an interesting combination. They could start off not getting along because of their very different personalities, with Saitama being laid - back and Tornado being more high - strung. But as they face challenges during the mission, they gradually learn to respect each other and form an unlikely friendship.
Another plot idea is that in the fanfiction world, there is a prophecy that Saitama and Tornado will together save the world from an impending doom. But neither of them believes in prophecies at first. As events unfold and signs of the impending disaster start to show, they start to question if there might be some truth to it. They then embark on a journey to find out more about the prophecy and how they are supposed to save the world, all while their relationship develops from reluctant allies to something more.
A fanfiction plot could involve Tatsumaki and Saitama getting trapped in an alternate dimension. They have to rely on each other to find a way out. Along the way, they learn more about each other's pasts and what made them become heroes. This would be a great opportunity for character development and exploring their relationship in a new setting.
One idea could be that Saitama and Tatsumaki are forced to team up for a special mission. During this mission, Tatsumaki starts to see Saitama's hidden strength and unique charm, which gradually changes her initial dismissive attitude towards him.
At first, their relationship might be rocky. Saitama, being depressed, might not be very receptive to Tornado's brash personality. But as time passes, Tornado could start to show a more caring side. She might use her powers to create small, positive things for Saitama, like a beautiful garden in the middle of the city just for him to relax in. This could start to break down Saitama's walls, and they could gradually become friends.
Saitama's character could be developed through his reactions to Tornado's psychic powers. He might be in awe of them at first and then start to think about the limitations of his own strength. This could lead to a more introspective side of him. Tornado could be developed by having her face situations where her psychic powers are not enough. This would force her to look at Saitama's strength in a new light and also make her more humble. Their relationship could grow as they help each other overcome these challenges.
A fanfiction where the reader is a superhero too and has to team up with Saitama against a powerful enemy. This would create a different dynamic in their relationship compared to the normal ones. Or a story where Saitama loses his powers and the reader has to help him regain them while their relationship blossoms. It would be interesting to see how Saitama copes without his powers and how the reader supports him.
One possible plot could be that Tornado initially challenges Saitama out of pride. She sees his nonchalant attitude and wants to prove that her psychic powers are superior. Saitama, being Saitama, just goes along with it. As the battle unfolds, Tornado throws everything she has at Saitama, but he just dodges casually. Eventually, Saitama throws a light punch that knocks Tornado back, but not seriously hurt, which makes her realize his true strength.
A plot where Saitama travels to different dimensions in the One Punch Man universe. He could encounter strange versions of himself or other heroes and villains, leading to humorous and action - packed situations.
One possible story could be that Saitama's depression stems from his unending power and lack of real challenges. Tornado, being a powerful esper, might sense his distress. She could initially be dismissive but then gradually try to understand him. Maybe she uses her powers in a creative way to give Saitama a sense of purpose, like creating artificial threats that are not too easy for him to defeat.
One plot idea could be that Female Genos is in a battle and gets severely damaged. Saitama helps her repair and during this process, they start to understand each other on a deeper level. They might share their pasts, like Saitama talking about his mundane pre - hero life and Genos about her reasons for becoming a cyborg. This could lead to a budding friendship or something more romantic over time.
One idea could be a story where Genos accidentally discovers Saitama's secret love for lemon-flavored things and decides to surprise him with a lemon - themed day. He could make lemon pies, lemonade, and decorate their place with lemon - scented items. Another plot could involve a lemon - related challenge where they both have to complete tasks involving lemons to gain some sort of power - up or reward. Maybe a mysterious lemon - themed villain appears and they have to defeat it using their combined strength and the unique properties of lemons.