Perhaps their story is a love - at - first - sight kind of thing. Emna is a shy girl with a heart of gold and Killian is a charming young man. They fall in love quickly but then have to fight against all odds to stay together. There could be an evil sorcerer who wants to break them apart because their combined power (Emna's magic and Killian's leadership skills) could pose a threat to his plans of taking over the land.
A simple plot could be that Emna and Killian are childhood friends. As they grow up, they realize their feelings for each other have changed from friendship to love. But their families have some old feud that they need to overcome. They might secretly meet in a hidden meadow where they share their dreams and hopes for the future.
It's popular because fans love the characters of Emma and Killian. Their relationship has a lot of potential for different storylines. People enjoy exploring their personalities further in fanfiction.
One great 'Forever My Girl Emma and Killian fanfiction' story could be where they go on an adventure to a magical island. In this story, they face challenges together and their relationship deepens as they rely on each other's strengths. Another could be a story set in a modern - day city where they meet by chance and have to deal with the normal problems of life while falling in love.
It's purely fictional. The plot and characters of 'Forever My Girl' were imagined by the writers and not drawn from real-life events. They crafted a tale to engage and move the audience within a fictional framework.