In a fanfiction scenario, they could be at the lemon - scented hot spring alone, and Natsu discovers that the hot spring has some sort of magical property that makes him more in touch with his emotions. He then starts to confess to Lucy how much he values her as a teammate and friend, but in a more heartfelt way than usual. Lucy is touched and they have a really sweet moment together.
In this fanfiction scenario, Natsu and Lucy might have a relaxing time in the lemon - scented hot spring. They could start with some light banter, Natsu being his usual energetic self while Lucy is a bit more reserved at first. Maybe they share stories about their recent quests and gradually grow closer in this serene setting.
A simple plot could be that Natsu and Lucy are exploring a new area and stumble upon a hidden lemon hot spring. They decide to take a dip. While in the hot spring, they notice some strange glowing fish in the water. Natsu wants to catch one, but Lucy warns him not to. Of course, Natsu being Natsu, he tries anyway and ends up causing a bit of chaos in the hot spring.
One good story could be 'Natsu and Lucy's Adventure in the Lemon Grove'. In this fanfiction, Natsu and Lucy find themselves in a magical lemon grove where they have to solve a mystery related to the hot lemons. It has a lot of sweet and adventurous moments between them.
In the fanfiction, the lemon hot spring could be a place of peace for Natsu and Lucy. The lemon essence in the water could have a rejuvenating effect on them. Natsu could show his protective side towards Lucy in this setting. For example, if there were any small creatures around that seemed threatening, he would be on guard. And Lucy, in turn, could share her thoughts on the beauty of the place with Natsu, deepening their friendship.
The main characters are clearly Natsu and Lucy. Natsu is a powerful dragon slayer with a fiery personality. He's impulsive and brave. Lucy is a celestial wizard. She's smart and kind - hearted. Together, they form an interesting pair in the fanfic.
You can start by searching on popular fanfiction websites like FanFiction.net or Archive of Our Own. Just type in 'natsu and lucy hot lemon' in the search bar, and you'll get a list of relevant stories.
One possible plot could be that Natsu and Lucy go on a dangerous mission together. In the middle of it, they find a mysterious lemon - like magical item. As they study it, they start to feel a strange warmth between them. They then have to overcome their initial shyness and admit their feelings for each other while dealing with the power of this strange item.
One great Natsu, Erza and Lucy fanfiction is 'The Grand Adventure'. It has an exciting plot where they go on a quest together. The character interactions are really well - written, especially the banter between Natsu and Lucy.
I'm not sure specifically as I haven't read this particular fanfiction. But generally, it might involve Natsu and Lucy having some sort of adventure or interaction at a lemon spa. Maybe they go there to relax after a tough mission and something unexpected occurs during their time at the spa.