Yes, there are likely fanfictions with such a scene. You can search on popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. However, keep in mind that the content might vary in terms of writing quality and adherence to the original spirit of the characters.
One possible plot could be that they finally confess their long - hidden feelings for each other after a series of misunderstandings and adventures. They end up in a moment of intimacy in bed and share a kiss. Another could be a situation where they are in a fake relationship at first for some external reason, but as they spend more time together in the same living space, feelings develop and lead to the kiss in bed. Or perhaps they are in a dangerous situation, like being trapped somewhere, and the closeness and shared vulnerability lead to the romantic moment.
'The Kiss in the Rain' is another great one. The setting of a rain - soaked Paris adds a lot of romantic charm to their kiss. The story leading up to the kiss is filled with tension and longing, making the actual kiss all the more satisfying for the readers.
Another possibility is that they are on a mission as Ladybug and Chat Noir. They get separated from the villain and find themselves in a secluded alley. In that moment of relief and closeness, they give in to their feelings and kiss. This kiss would be a bit more rushed and urgent compared to the one at the dance, but still full of love.
One more to consider is 'Kiss in the Moonlight'. This fanfic sets the kiss in a very romantic and dreamy setting, perhaps under the light of the moon during a special event in Paris. It explores how this kiss could be a turning point in their relationship and how it might impact their future interactions in the Miraculous world.
Well, after the kiss, they could go through a phase of denial. Adrien might think it was just a momentary lapse due to jealousy, and Marinette could be too scared to admit her true feelings. But as time passes, they keep having these small moments where they're drawn to each other. Eventually, a series of events, like a near - akumatization situation where they save each other, makes them realize that they can't keep denying their feelings. So, they start to tentatively explore a romantic relationship.
Well, it could be a really sweet and tender moment. Maybe it happens after a big battle where they've finally realized their true feelings for each other. Marinette, being her shy self at first, but then Adrien takes the lead and they share a gentle kiss that makes the whole world seem to stop for a moment.
Once upon a time, Marinette and Adrien's big day finally arrived. The city of Paris was adorned with flowers and ribbons. Marinette, in her beautiful white gown, walked down the aisle. Adrien, looking dashing in his suit, had tears of joy in his eyes. Their friends and family watched with love. As they said their vows, the whole place was filled with an air of magic. And then they were pronounced husband and wife, sharing a passionate kiss as confetti rained down on them.
A great element in such a fanfiction could be the family aspect. Maybe they start thinking about having children. How would they raise their kids? Would their children inherit their superhero powers? And how would they protect their family from the villains in their world? Their friends like Alya and Nino could also play important roles in their married life, perhaps as godparents or just as good friends who are always there to offer advice and support.
Yes, there are plenty. There are fanfictions that focus on their budding romance, like the ones where they go on a cute date or have a heartfelt conversation that deepens their relationship in a sweet and innocent way.