There could be such a fanfic out there. However, the world of fanfiction is vast and unregulated. It's possible that it exists on some niche fanfic platforms. But it's also important to note that some fanfics may deviate from the original source material in ways that some fans might not like. So, even if it exists, it might not be to everyone's taste.
Well, clearly Lucy and Natsu are the main characters. Lucy is often depicted as a smart and resourceful character, while Natsu is more of the impulsive and strong - willed one.
One interesting plot could be that they meet in a virtual world while on a quest that is only possible online. They have to team up to defeat a digital monster.
Lucy could be an ordinary girl who stumbles upon the dragon by accident. Maybe she was just exploring an old forest or a mysterious cave when she came across it.
Lucy Letby in the Lucy Letby story is a nurse who has been convicted of the most dreadful crimes. She was part of a neonatal unit's staff, but instead of providing care and protection to the babies, she did the opposite. She was involved in actions that led to the death and harm of multiple infants. Her actions were finally exposed through investigations, and she now stands as a symbol of the worst - case scenario in a medical care setting.
The 'Lucy' in the 'lucy in the sky real story' is rather ambiguous. It could be a symbol that Lennon came up with. It may have been a composite of different ideas or experiences. Since the song was related to psychedelic experiences, it might not be based on a real - life 'Lucy' but rather a concept that emerged during the creative process, perhaps something that represented a certain state of mind or a dream - like vision.
There's not enough information to really know who Lucy specifically is. She could be just a regular reader of fanfiction who took the time to rate this piece as M. Maybe she's part of a fanfiction community where people rate works to help others know what to expect.
You could try looking on Disney+. They often have a good selection of movies like this. Another option could be Vudu. Just keep in mind that it might require a subscription or rental fee depending on the platform.