Another development could be that Lucy rejects Natsu's kiss. She might think that Asuka was just joking around and not take it seriously at first. But then when she realizes that Natsu was actually going to do it, she backs away. This could create some tension between them. Natsu might be confused and hurt, while Lucy has to deal with her own mixed feelings. It could lead to a story arc where they have to work through their relationship issues and figure out where they really stand with each other.
Well, one possible plot development could be that Natsu is initially hesitant. After all, he and Lucy have a complex relationship that's more of a deep friendship with some unspoken feelings. But Asuka's words make him start to see Lucy in a new light. He might start to notice little things about her that he hadn't paid much attention to before, like the way her eyes sparkle when she's excited or how she always has a kind word for everyone. This could lead to a series of awkward but sweet moments between them as Natsu tries to figure out his feelings.
Asuka could also be a childhood friend of either Natsu or Lucy. She has known them for a long time and has watched their relationship grow. So, she decides to take matters into her own hands and tells Natsu to kiss Lucy, hoping that it will finally make them realize their true feelings for each other.
It could be about Natsu using his singing to express his deep feelings for Asuka. Maybe he sings to comfort her during a difficult time or to celebrate a special occasion in their relationship.
Well, perhaps Natsu could be sparring with Lucy and accidentally land a more powerful blow than he intended during a training session. Maybe he's in his dragon force mode and loses control for a second, hitting Lucy hard enough to make her fall and get injured.
In this fanfiction, the Natsu and Lucy kiss could be a dream - like sequence at first. Lucy might be dreaming about her feelings for Natsu, and in the dream, they kiss. However, the lemon aspect could be that this dream has a very sensual undertone. When she wakes up, she's left with these confusing and strong emotions that she then has to face Natsu with. It could lead to an interesting exploration of how they both really feel about each other and how they handle this new level of intimacy that the dream has introduced, even if it was just in her mind at first.
Perhaps Natsu kidnaps Lucy as a prank that goes wrong. He initially thinks it'll be a funny joke, like taking her away during a guild party just for a bit of chaos. But then things get out of hand. Lucy might be really angry at first, but as they are alone together, they start to have some deep conversations and understand each other better.
A possible plot could be that their married life is disrupted by a mysterious force that is causing chaos in the magical world. Natsu and Lucy, being the strong couple they are, set out to find the source of this problem. As they journey, they discover secrets about their own powers and how their union might be the key to saving the world. There could be moments of doubt and fear, but their love for each other always pulls them through.
One possible plot development could be that Laxus initially struggles with the news. He might be worried about his ability to be a good father. However, as time passes, he realizes his love for Lucy and their unborn child and starts to prepare for the new addition to their lives. For example, he could start training harder to be a protector of his family.
Well, one possibility could be that it's a really innocent situation. Maybe they got into some kind of magical mishap that made them dirty and the only available place to clean up was a shared shower area. But they're both really embarrassed and trying to be respectful of each other's space while also dealing with the comical aspect of the situation.
Well, it could start with Natsu barging into the bathroom thinking it's unoccupied, only to find Lucy already in the bath. There could be a lot of blushing and yelling from Lucy. Then, they might have to figure out how to get Natsu out without alerting the whole guild. Or perhaps, it could be a magical accident that causes them to end up in the same bath, and they have to work together to reverse the spell while dealing with their embarrassment.
One possibility could be that it's a comical situation. Maybe they got into some kind of magical mishap that left them dirty and the only available place to clean up was a small bathroom where they had to share the shower in a very awkward way. Natsu, being his clueless self about social norms, doesn't really understand the awkwardness at first while Lucy is blushing like crazy.