Joffrey was a cruel character. It's hard to imagine a traditional love story for him. His nature was so malicious that any form of love seemed out of place. He was more interested in power and causing pain. So, in the context of the show, a real love story for him seems almost impossible.
There could be a really interesting fanfic where a Dragonborn enters the world of Game of Thrones during Joffrey's reign. Maybe the Dragonborn would initially be seen as a threat by Joffrey. But the Dragonborn's powers could change the power dynamics in King's Landing. For example, if the Dragonborn has the ability to control dragons, it would be a huge advantage over the Lannisters who rely mainly on their wealth and military might at that time.
In the context of the fanfic, the Dragonborn's presence could also expose Joffrey's weaknesses more clearly. The people of Westeros, seeing someone with such great power (the Dragonborn) who is not as cruel as Joffrey, might be more inspired to rise up against Joffrey. And Joffrey's own allies might start to question their loyalty to him when they see the Dragonborn as a potential new power player in the game of thrones.
Joffrey is often characterized as even more cruel and unhinged in fanfiction. His violent outbursts and lack of mercy are sometimes exaggerated. Margaery is usually shown as a very intelligent and manipulative woman. She uses her beauty and charm to her advantage.
There are some really interesting fanfics out there that combine the concepts of a Dragonborn in the Game of Thrones universe with Joffrey. One I've read had the Dragonborn as a sort of mysterious figure who arrives in King's Landing during Joffrey's reign. The Dragonborn's presence throws the power dynamics into chaos as they have their own set of powers and motives. It was really fascinating to see how the author played with the different personalities and politics of the Game of Thrones world in that fanfic.
A fanfic involving a Dragonborn in the Game of Thrones universe with Joffrey could be a wild ride. Maybe the Dragonborn, with their dragon - riding abilities and magic, would pose a significant threat to Joffrey's tyrannical rule. They could swoop in on their dragon, causing chaos in King's Landing and challenging Joffrey's claim to the throne.
In fanfiction, Joffrey and Margaery's relationship is often complex. Joffrey was a cruel and unpredictable character. Margaery, on the other hand, was more calculating. In some fanfictions, Margaery might be seen as trying to manipulate Joffrey for her own gain, like gaining more power in King's Landing. Their relationship could be full of political intrigue and power plays as they both come from powerful families with their own agendas.
In the official 'Game of Thrones' series, it was Sansa's necklace (which was actually a poisoned device) that led to Joffrey's death, not Arya. However, in some fanfics, authors might create alternate storylines where Arya kills Joffrey. But these are non - canonical and just creative interpretations by fans.
One popular fanfiction is 'Joffrey's Path to Redemption'. It focuses on Joffrey realizing the error of his ways and trying to make amends for his past cruelties. It's family - friendly as it doesn't involve any inappropriate content and instead focuses on moral growth.