Well, there's a fanfiction called 'Alice in the Vampire's Realm'. In this one, Alice gets transported to a different part of the Gakuen Alice world that is dominated by vampires. It's really good at exploring the power dynamics between the characters and how Alice has to adapt to survive. It also has some really sweet moments of friendship that develop in unexpected ways.
The blend of the Gakuen Alice world with vampire elements is appealing. It combines the unique powers and school setting of Gakuen Alice with the mystery and allure of vampires.
One idea could be that the OC is a new student at Gakuen Alice with a very unique and powerful Alice ability. Natsume, being initially aloof, gradually warms up to the OC as they are paired up for a special project at school. Their relationship starts to develop as they face various challenges together, like dealing with the strict rules of the school and the jealousy of other students.
I'm not sure exactly what this specific 'kiss of fate gakuen alice fanfiction' is about as there could be many different interpretations. It might be about a fateful encounter in the Gakuen Alice world, perhaps a romantic kiss that changes the course of the characters' relationships.
Here is a simple start for a Gakuen Alice Natsume OC fanfiction. My OC, named Aria, arrives at Gakuen Alice. She is a shy girl with a special alice that allows her to communicate with animals. When she first meets Natsume, he is as cold as ever. But Aria's kind nature starts to slowly break through his icy exterior. She often finds Natsume in the garden, alone with his thoughts. One day, she approaches him and offers him a flower she just picked. Natsume is initially taken aback but then accepts it.
Well, in many Gakuen Alice fanfictions focusing on Mikan and Natsume's kiss, it's often a very emotional moment. Writers usually build up a lot of tension between the two characters before this moment. For example, they might have Mikan slowly realizing her feelings for Natsume as they go through various adventures together at the academy. And when the kiss finally happens, it's like the culmination of all those unspoken emotions and shared experiences.
One interesting concept could be an OC who has a unique and powerful alice that no one has seen before. For example, an alice that can control time in a very specific way, like only being able to freeze time for inanimate objects. This would create a lot of unique situations in the Gakuen Alice setting.
In fanfiction, the Natsume and Mikan kiss could be a turning point in their relationship. It could signify a new level of trust and understanding between them. For example, perhaps they've just overcome a major obstacle together, and the kiss is a spontaneous expression of their relief and new - found closeness.
Typically, 'gakuen alice lemon fanfic' might have more intense romantic or relationship - based storylines compared to regular fanfics. The 'lemon' aspect often indicates a certain level of sensuality in the relationships portrayed.