An interesting setting could be in a dangerous situation. For example, Naruto is in the middle of a battle and is about to be defeated. Kushina appears (maybe as a spirit or some other form) and gives him a kiss that empowers him, allowing him to turn the tides of the battle.
One setting could be at a school dance. The lights are low, the music is playing softly, and Ralph and Caitlin find themselves alone on the dance floor. They look into each other's eyes and share a tender kiss.
Another setting might be during a festival. There are bright lights, happy people all around, and a festive mood in the air. Yato and Bishamon could get caught up in the excitement and find themselves in a secluded corner where they kiss. The noise and celebration of the festival contrast with the intimate moment between them.
One possible plot could be a flashback story. Maybe it's Kushina's last moment before her death and she gives Naruto a loving kiss as a final goodbye and a transfer of her unwavering love and protection. It could also show Naruto's reaction to this unexpected and bittersweet moment, perhaps giving him newfound strength and a deeper understanding of his mother's love.
One common setting is on a spaceship. They could be in a quiet corner of the ship, away from the rest of the crew. Maybe they've just survived a dangerous battle, and the adrenaline rush leads to the kiss. Another setting could be on a desolate planet. They're alone, and the isolation makes them confront their feelings for each other, resulting in the kiss.
Another setting could be on a beach. The sun is setting, painting the sky in beautiful hues of orange and pink. Akito and Sana are taking a walk along the shore. The gentle sound of the waves crashing is the only noise. Akito stops Sana, looks into her eyes, and kisses her. The beach setting adds a sense of romance and tranquility to the moment.
One setting might be in a secret underground lair. They've just defeated some bad guys and in the heat of the moment, they share a kiss. There are strange machines and artifacts all around them. It gives a sense of adventure and danger. Also, they could kiss in a beautiful garden full of exotic flowers. The colors and scents of the flowers add to the romantic mood, and there might be little fairies or magical creatures flitting about, making it an even more magical place for their kiss.
A high school setting would be a common one. They could be in the school cafeteria during lunch break. Maybe there's a school dance coming up and they are both on the committee to organize it. Tensions and feelings build up as they work together, and finally, they kiss in the empty cafeteria after everyone has left for the day.
One common setting is a beautiful, peaceful balcony. The twinkling stars above and the gentle breeze create a romantic atmosphere for their first kiss. Another setting could be in a dimly - lit room, where they are having a deep conversation and the moment just feels right for that kiss. Also, some fanfictions might have their first kiss in a natural setting like a forest, with the sounds of nature as a backdrop.
One common setting is on a ship. Hook's ship is his territory, and it gives a sense of adventure and danger. Maybe they've just survived an attack on the ship, and in the relief and adrenaline, they share their first kiss. Another setting could be in a forest. They might be on a quest, and in the midst of the beautiful but somewhat eerie forest, they stop and kiss for the first time.
There might be a fanfic where Kushina is brought back to life briefly, and in that short time, she shares a kiss with Naruto as a way to convey all the love she had for him that was cut short when she died. It could also be a fanfic set in an alternate universe where the circumstances are different, and Kushina and Naruto have a closer bond than in the original story, leading to a kiss.