Why does Natsu keep Lucy's secret from Fairy Tail in the fanfiction?

Perhaps the secret is that Lucy has a unique magical item that is very powerful and dangerous. Natsu keeps it a secret because he doesn't want other mages in Fairy Tail to get greedy or misuse it. This item could be something that was passed down in Lucy's family and she doesn't fully understand its potential yet.

Perhaps in the fanfiction's plot, Natsu makes a big mistake that endangers Lucy or her friends. Let's say he recklessly takes on a powerful enemy without a proper plan, and Lucy's friends get hurt as a result. This might cause her to hate Natsu for his irresponsible behavior.

In fanfiction, Lucy might want Natsu because of their strong bond. They've been through many adventures together. Natsu is always there to protect her, and his brave and fun - loving nature attracts Lucy.

He could kidnap her because he believes she's in immediate danger. Natsu is very impulsive and might not have time to explain things properly, so he just takes her away to keep her safe.

In many fanfictions, Natsu protects Lucy by using his powerful fire magic against their enemies. For example, if they encounter a dark guild attacking Lucy, Natsu would jump in front of her and unleash a flurry of fire attacks like his 'Fire Dragon's Roar' to drive the enemies away.

In some fanfictions, Lucy might use her Celestial Spirit magic. For example, she could summon a powerful spirit like Leo to help fight off whatever is threatening Natsu. The spirit could provide a distraction or directly combat the enemy while Lucy tries to reach Natsu and get him to safety.

In a fanfiction of Natsu and Lucy at the spa, the spa could be a place where they face some challenges too. Maybe there's a villain who tries to disrupt the peaceful spa environment. Natsu and Lucy would then have to use their skills, not just in combat but also in keeping the other guests calm. Natsu's fiery nature and Lucy's intelligence would work together to solve the problem, all while still in their spa robes. And in the end, they might realize they make a great team even in such an unexpected place.

In fanfiction, Natsu and Lucy at the spa could be a really fun scenario. Maybe they go to the spa after a tough mission. Natsu, being his energetic self, might be a bit out of place in the calm spa environment at first. But with Lucy's guidance, he starts to relax. They could share some funny moments like Natsu accidentally making a big splash in the hot tub or getting confused by all the different scented oils. It's a great opportunity for their relationship to grow in a more relaxed and non - combat setting.

A possible scenario in a fanfiction could be that Natsu realizes his true feelings for Lucy during a mission where he sees her in danger. He rushes to save her and in the heat of the moment, their lips meet. This kind of kiss is often a spontaneous expression of love and care in fanfiction stories.

Maybe Natsu hates Fairy Tail fanfiction because he doesn't like how some fanfictions distort the original story or the characters. In the original Fairy Tail, he has a clear personality and relationships, and fanfictions might change that in ways he wouldn't like.