Perhaps the fanfic could explore the different ways the two characters show their love. Sokka might show his love in a more practical or protective way, while the narrator has a more emotional and passionate love. This contrast could lead to conflicts and misunderstandings between them.
Another possibility is that they are set in a modern - day fictional world with a bit of a magical twist. Sokka could be a popular guy at school or in a small town, the girl could be an artist or a musician, and the narrator is the shy, but deeply in - love outsider who feels Sokka doesn't truly understand the girl's soul like he does.
The main conflict might be the unrequited love. If the narrator loves a character deeply but Katara doesn't feel the same way, it could lead to a lot of emotional turmoil. The narrator may struggle with jealousy if Katara shows affection towards someone else. There could also be a conflict where the narrator tries to prove their love is greater, but Katara is either oblivious or not interested.
It could end with the narrator finally accepting that Katara will never love 'her' in the same way and moving on. Maybe they find someone else who appreciates their love.
Another plot could be that the character who says this has met someone else who shows them a different kind of love and attention. They start comparing this new person to Vegeta and realize that they are no longer in love with Vegeta. This new relationship makes them see all the flaws in their relationship with Vegeta that they were previously overlooking.
One possible plot could be that the narrator has grown apart from Sakura over time. Maybe they had different life goals. For example, Sakura was too focused on her career and the narrator felt neglected. So, the narrator gradually lost the love they once had.
Maybe it's about a journalist covering an event from the sidelines and falling in love with one of the participants. The story could then revolve around how they try to balance their professional distance with their growing personal feelings.
One possible plotline could be about a character who has a menacing appearance but is actually kind-hearted. For example, a vampire who is misunderstood in a small town. People fear him because of his nature, but he's determined to show that he won't hurt anyone. He might start by saving a child from a dangerous situation, like a burning building. This could be the beginning of his journey to gain the trust of the townspeople.
It could be that the character has found someone else who shows more care and attention. In fanfics, new characters can be introduced who are more in tune with the main character's emotional needs. Unlike Vegeta, who may be seen as too cold or unresponsive.
In this fanfic, it could be that Deku's quirk goes out of control during a training exercise. He loses the ability to contain his power and it ends up consuming him, resulting in his death. This would create a lot of self - reflection among the other students about the risks of their quirks and the importance of proper training and control.
One possible plotline could be Naruto having to control the power of the Jubbi. He might struggle at first, but with his determination, he gradually learns to harness it for good, like using it to protect the Hidden Leaf Village from a new, powerful enemy.