Well, perhaps in this fanfiction, there's a magical event that brings Naruto and Weiss together. Naruto's warm - hearted and bold nature might intrigue Weiss. As they embark on an adventure to solve a common problem in this merged world, they grow closer. The kiss could be a moment of high emotion during a dangerous situation, like when Naruto saves Weiss from a powerful enemy, and in that moment of relief and gratitude, they kiss.
First, you need to research both Naruto and Weiss's characters thoroughly. Know their personalities, backstories, and what makes them unique. Then, create a believable scenario for them to meet. For example, a dimensional rift could bring them together. When it comes to the kiss, build up the tension gradually. Show their growing attraction through small interactions, like glances, accidental touches, etc.
Perhaps in the fanfic, Fuuka is a new character introduced to the Naruto universe. She has a special ability that Naruto is intrigued by. As they train together to master her ability, their bond grows stronger. Eventually, during a festival in Konoha, they share a kiss under the cherry blossoms.
One possible storyline could be that Bolin and Korra have been friends for a long time. As they face a great danger together, like a powerful dark spirit attacking the city. In the heat of the battle, they realize their true feelings for each other and share a kiss as a sign of newfound love and a new chapter in their relationship.
One possible storyline could be that Snivy and Oshawott are on an adventure together. They face a dangerous situation, like a powerful wild Pokémon attacking them. In the heat of the moment, to comfort each other, they share a kiss. This kiss could mark a turning point in their relationship, making them realize their deeper feelings for one another and they become closer partners in their future adventures.
One possible storyline could be that after many adventures together, Gaara and Matsuri finally realize their deep feelings for each other. Their kiss could be a moment of pure passion and connection, perhaps after Gaara has overcome some internal struggle or after Matsuri has proven her loyalty to him in a difficult situation. It could also mark the start of a new chapter in their relationship, where they become more open and affectionate with each other in the face of the challenges that lie ahead in their world.
In a more AU (Alternate Universe) setting, they could be in a world where the titan threat doesn't exist. They are just two normal people in a small town. Eren has been in love with Mikasa for a long time but was too shy to act. One day, during a local festival, he finally gathers the courage to kiss her under the twinkling lights.
In a fanfiction scenario, it could be that there is a curse or a spell that forces Percy and Artemis to experience each other's emotions. As they start to feel what the other feels, they begin to understand each other on a deeper level. Percy's loyalty and courage become more than just traits to Artemis, and Artemis's wisdom and power seem less intimidating to Percy. The kiss then becomes a natural expression of the closeness that has developed through this shared experience.
The kiss in the fanfiction might be a plot device to show a turning point in their relationship. It could be set in a time when all hope seems lost for their world. But through this kiss, they find the strength to fight together. It might be filled with passion, not just romantic passion but also the passion to save their world and the people they care about.
One possible storyline could be that they are in the middle of a dangerous mission. They've been through so much together and have always had a deep, unspoken connection. As they face a near - death situation, the intensity of the moment makes them realize their true feelings for each other and they share a kiss. It could be a moment of both passion and relief, knowing that they've survived and also finally acknowledged their love.
One possible storyline could be that they are rehearsing for a big dance performance together. As they practice a particularly passionate duet, they share a spontaneous kiss. This kiss could then lead to them realizing their feelings for each other are more than just friendship. They might start secretly meeting up to practice more, and their relationship could develop from there.