One interesting alhaitham fanfic could be about his adventures in a new, uncharted part of his world. Maybe he discovers a long - lost civilization and has to use his intelligence to interact with them.
Ask in relevant online communities or forums dedicated to the source material that alhaitham is from. Other fans might be able to recommend some great fanfics that they've read.
In such a fanfiction, the jealousy aspect can also add a lot of drama. For example, if Deku is oblivious to Kacchan's jealousy, it can create misunderstandings. Kacchan might misinterpret Deku's friendly gestures towards others as something more, and this can cause tension. It's a great way for fanfic writers to delve into the psychological aspects of these two beloved characters and create engaging stories.
One possible aspect of 'ciel x sebastian jealous fanfic' could be the exploration of complex emotions. In many such fanfics, the jealousy might stem from the unique relationship between Ciel and Sebastian. For example, if there's a new character introduced, Ciel might feel jealous of the attention Sebastian gives to that character. It can add an interesting layer to their relationship which is already full of mystery and power dynamics.
One aspect could be the complex relationship between Sebastian and Ciel in the fanfic. Sebastian's jealousy might stem from his possessive nature over Ciel. He is Ciel's butler but also has a deeper, perhaps unspoken bond. This jealousy could add a new layer of tension to their interactions, for example, when other characters get too close to Ciel. It might lead to some interesting plot developments like Sebastian becoming more protective or overbearing in a way that both confounds and endears him to Ciel.
First, you need to establish the relationship between Sasuke and Sakura. Are they already in a relationship or still in the pining stage? If they're in a relationship, you can create a situation where an outsider threatens their bond. For example, a new ninja arrives in the village who has a similar personality to Sasuke and shows interest in Sakura. Then, describe Sakura's reaction. Will she be flattered or immediately reject the new person? For Sasuke, show how he notices Sakura's reaction and how it makes him feel jealous. You can also include internal monologues for both characters to really delve into their emotions.
How about 'Giyuu x Shinobu: The Jealousy Factor'? This title clearly shows the relationship between the two characters and the key aspect of jealousy. It gives a hint to the readers about what the fanfic might be about, which is the jealousy that could exist in their relationship.
The theme of misunderstandings is very common. As mentioned before, Deku might not understand why Kacchan is acting so strangely when he's jealous. This can lead to a cycle of miscommunication and further fuel the drama in the fanfiction. Also, the theme of growth is there. Kacchan's jealousy could be a catalyst for his character growth as he learns to deal with his emotions better.
One common theme is possessiveness. Gajeel often shows his possessive side when he's jealous, not wanting Levy to be too close to others. For example, in many fics, he'll glare at any male character who gets too friendly with Levy.
One possible plot could be that the reader starts to feel jealous of Lily because James used to have a crush on her. Maybe James still has some lingering feelings for Lily that he's not fully aware of, and the reader notices the way he looks at her sometimes. This makes the reader question their relationship with James.