The kiss can be a turning point. It might make their relationship more serious. Before the kiss, they might have just been friends or had unspoken feelings. But after the kiss, they start to think about a future together. For example, they might start spending more time alone, going on secret dates around Hogwarts, like picnics by the lake.
James Potter was a bundle of nerves as he waited for Lily Evans outside the Three Broomsticks. He had combed his hair a dozen times and made sure his robes were spotless. When Lily finally arrived, her red hair seemed to shine even in the dim light of the pub. They started with a butterbeer each, and James stammered out a joke that made Lily laugh. As they talked, James found himself more and more drawn to her intelligence and kind heart. They ended the date by taking a stroll under the starry sky, and James knew this was just the beginning of something wonderful.
One interesting scenario could be that the kiss happens right after James has finally proven himself to Lily. Maybe he has just saved her from some sort of danger, like a dark wizard attack at Hogwarts. Lily, seeing James in a new light, is so overcome with gratitude and a newfound attraction that she impulsively kisses him. This would be a moment of realization for both of them, as James has been longing for Lily's affection for so long.
The main characters are James Potter and Lily Evans, of course. James is a popular and sometimes mischievous wizard at Hogwarts. He's known for his talent in Quidditch and his group of friends. Lily, on the other hand, is a bright and intelligent witch. She's kind - hearted but also has a strong will, which makes her very interesting.
They could go for a walk around the Hogwarts Lake. James might show Lily the secret spots he knew around the lake, like the hidden alcove where he used to go to think. They might also see some magical creatures along the way. James could try to impress Lily by imitating the calls of the creatures.
One common theme is growth. You see James Potter grow from a bit of a troublemaker to a more responsible person because of his love for Lily. Lily also grows in her understanding of James. Additionally, the theme of family is important. Their future family, especially with Harry, is sometimes hinted at in the fanfictions. The war against the dark forces is also a theme that often comes up, as it affects their relationship and their lives.
One common theme is their relationship development. It often starts from their initial dislike or indifference to each other, like in the books, and then gradually grows into love. For example, in many fanfictions, James has to work hard to change Lily's perception of him from a bully to a worthy partner.
The theme of growth is often present. Both James and Lily grow as individuals and as a couple in many fanfictions. They learn from their experiences, become more empathetic, and this growth is what cements their relationship in these stories.
In many fanfictions about them, the theme of sacrifice is present. Given the dangerous wizarding world they live in, they might have to sacrifice personal desires or safety for each other. Also, the theme of family is important. Since they end up having a family together, stories often explore how their relationship sets the foundation for the Potter family, and how their love influences their future children, like Harry.
I really like 'James and Lily: A Love Story'. It delves deep into their relationship, starting from their initial dislike for each other to their deep, abiding love. It also includes some really interesting side plots involving their friends like Sirius and Remus. And 'Potter's Love' is also a great read. It shows how their love survived the challenges of the wizarding world around them.