It could be a tragic kiss. Given their complex relationship in the Fairy Tail lore, perhaps the kiss is a final goodbye. Zeref, with his dark nature, might be sacrificing himself or being forced to part from Mavis. And this kiss holds all the unspoken words, all the love that could never be fully realized in a normal way because of their fates.
One common theme is redemption. Since Zeref has a dark past, the kiss could be a step towards his redemption. Mavis, being a more positive character, might be the catalyst for this change through the kiss.
Yes, there are likely some fanfictions out there with this concept. You can try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own. Just type in 'Naruto Brother of Zeref' in their search bars and see what comes up.
Their relationship would likely become more centered around the baby. They would have less time for just themselves and more time taking care of the baby's needs.
There's great potential in a Naruto and Mavis Vermillion fanfiction. Naruto's journey of self - discovery and growth can be paralleled with Mavis' own story in the Fairy Tail world. They both have had to overcome great hardships. For example, Naruto was an outcast in his village at first, and Mavis had to deal with the loss of her loved ones. In a fanfiction, they could find common ground in their shared experiences and help each other move forward.
One possible fanfiction could be that Natsu and Mavis get married in a simple yet magical ceremony. Their friends from Fairy Tail are all present, and the guild hall is decorated with beautiful flowers. Natsu is nervous but excited, and Mavis looks stunning in her white dress. After the wedding, they embark on a journey together to explore new lands and discover hidden magic, all while growing closer as a married couple.
In this fanfiction, Natsu and Mavis' married future could be one where they build a small cottage near the guild. They have a peaceful life, with Natsu going on occasional guild missions while Mavis stays back to tend to their home and garden. Their days are filled with simple joys like cooking together and sharing stories by the fireplace at night.
Well, in many fanfictions, their relationship might start with Natsu being a bit in awe of Mavis as she is a very important figure in Fairy Tail's history. Natsu, being his brash self, might initially make mistakes around her but gradually learns from her wisdom. As time goes on, he could come to respect her even more deeply and they might form a bond where Mavis becomes like a guiding light for Natsu in his adventures and growth within the Fairy Tail guild.
Yes, there might be such a fanfiction. It could be about Naruto somehow being connected to Zeref. Maybe Naruto gets transported to the world where Zeref exists and has to deal with Zeref's dark magic and his plans. It could also be a crossover where their powers combine in some unexpected ways, like Naruto's chakra interacting with Zeref's magic in a new form of combat.