Well, the plot might involve Pearl having some sort of quest or task related to the Mystery Girl. Maybe the Mystery Girl has a special power or knowledge that Pearl needs for something important in the Steven Universe world. Pearl then has to gain her trust. They could go on adventures together, with Pearl protecting the Mystery Girl from various threats. Along the way, they develop a deep friendship and learn a lot about each other's pasts.
One possible plot could be that Pearl is initially very curious about the Mystery Girl. She might observe her from a distance, trying to figure out her habits and what makes her so mysterious. Then, they could accidentally meet, and at first, Pearl is a bit clumsy in her interaction due to her own insecurities. But as time goes on, they start to bond over shared interests like music or art. The Mystery Girl could introduce Pearl to new aspects of human culture that Pearl has not fully experienced yet.
The fanfic could be about Pearl's internal struggle regarding her feelings for the Mystery Girl. Pearl has always been dedicated to Rose Quartz, and now she's facing new and different emotions. She might be hesitant to get close to the Mystery Girl because she's afraid of changing or betraying her past loyalty. However, the Mystery Girl is so alluring and kind that Pearl can't help but be drawn to her. As they interact more, Pearl gradually realizes that it's okay to have new relationships and experiences.
Pearl could develop greater courage. In the face of new and unknown situations with the Mystery Girl, she has to be brave. This could transform her from being a bit timid in new social situations to being more confident. For the Mystery Girl, she could develop a sense of loyalty towards Pearl. At first, she might be just a curious figure, but as they go through various events together, she becomes a steadfast friend to Pearl, willing to stand by her side no matter what.
Perhaps she's a time - traveler from a future where the events in Steven's world have led to some big changes. She could be on a mission to prevent a certain catastrophe from happening, and her presence in Steven's time is a crucial part of that plan. She might have knowledge of future events and technologies that seem strange to Steven and the others.
A possible element in such a fanfiction could be a hidden gemstone in the mystery girl's navel. It could be a new type of gem that has powers unknown to the Crystal Gems. The story could revolve around the discovery of these powers and how they affect the balance in the Steven Universe world.
In a small corner of Beach City, the Mystery Girl set up a little booth selling handmade jewelry. Steven was curious and went to check it out. He saw that the jewelry was made with some unique gemstones that he had never seen before. The Mystery Girl told him that she had collected these stones from all over the world during her travels. As they talked, Steven noticed that she had a small tattoo on her wrist that looked like a gem symbol. He asked her about it, but she just smiled and changed the subject. This made Steven even more determined to uncover the secrets of this fascinating girl.
I'm not sure if there are a lot of specific fanfictions just about the mystery girl's navel in Steven Universe. However, it could be an interesting concept for a story. Maybe the navel could be a unique feature that has some kind of magical or symbolic meaning in the fanfiction. For example, it could be the source of her power or a connection to an ancient secret.
One possible plot could be that the OC is a new arrival in town. Peedee, being the friendly and curious guy he is, decides to show the OC around. They start to bond over their shared love for the local food, which Peedee's family owns a shop for. As they spend more time together, they encounter some of the Gem - related adventures that are common in Steven Universe. And through these experiences, their friendship deepens and they might even face some challenges together that test their relationship.
I haven't read this specific fanfic yet. But generally, in 'Steven Universe' fanfics, Pink Pearl often plays an interesting role. If the 'lemon' in the title refers to a certain kind of fanfic trope, it might involve some more intense or emotional situations. Maybe this fanfic explores the character of Pink Pearl in a new and unique way, perhaps her relationship with other characters in the Steven Universe world.
There might be a fanfiction where Steven and Pearl go on an adventure to a new planet. In this story, they encounter strange new creatures and have to work together to overcome obstacles. It's a great way to explore their characters outside of the main storyline of the show.
In a fanfic where Steven dies, the story could take a very dark turn. The Crystal Gems would be devastated. Garnet might lose her composure as her future vision would be shattered by such an unexpected event. Pearl would likely be inconsolable, perhaps even blaming herself for not being able to protect Steven. Amethyst would struggle with the loss in her own way, maybe turning to more self - destructive behaviors. The whole Beach City would also be affected. People like Connie would be heartbroken. And the Diamonds, who had come to respect Steven, might have a complex reaction. They could feel remorse or try to find a way to bring him back, which could lead to all kinds of magical and dangerous adventures in the fanfic.
One interesting aspect could be the unique character interactions. In many fanfics, new relationships and developments between Steven and Pearl are explored, which might deviate from the original show's plot in creative ways. For example, they could go on adventures that were not part of the canon story.