One idea could be a crossover where Naruto somehow ends up in the world of 'My Bride is a Mermaid'. Maybe he's on a mission and a strange jutsu goes wrong, transporting him there. He could meet the mermaid characters and get involved in their underwater adventures while also trying to find a way back to his own world.
You could start by reading some of the fan fictions she likes. This way, you can have more things to talk about with her regarding her hobby. Also, you can buy her related books or merchandise, like mermaid - themed notebooks or bookmarks.
Naruto would probably be very curious about the mermaids. He might try to befriend them immediately. His friendly and outgoing nature would make him eager to learn about their culture and abilities. For example, he would be amazed at how mermaids can swim so gracefully and control water in ways he's never seen before.
Sure. You could try searching on fan fiction platforms like Archive of Our Own. There are often many fan fictions related to mermaid characters. Another option is FanFiction.net. They have a wide variety of works, and you might find some that are similar in theme or style to your bride's interests.
" My Wife, Something's Wrong " was a novel. It described how Luo Qingzhou was forced to marry a foolish bride who was said to be unable to speak or smile after he became a concubine of the Luo family of the Chengguo Constabulary in the Great Yan Empire. In the story, Luo Qingzhou realized that something was wrong with his wife and the people around her, including the two little handmaidens and the others. The people around his wife had their own characteristics. The big handmaiden was sweet and charming, the little handmaiden was cold as ice, the little sister-in-law was talented, the little cousin was arrogant and unreasonable, the father-in-law and mother-in-law had their own secret actions, and the second brother was devoted to martial arts. This novel had a total of 1051 chapters, and the author was Summer's Cicada.
The characters included the male lead, Merle Loreamon, and the female lead, Livia Loreamon.
"My Demon Bride" by Yitan Gull Heron. It was a fantasy/mystery fantasy novel with black-bellied, unscrupulous, relaxed, magic, fantasy history, love, and goddess elements.
User recommendation: [This is the attitude that a demon should have]
In order to fulfill her wish, Meyer accidentally found a demon summoning charm that could fulfill human wishes.
But the result of the demon summoned by Meyer was…
I hope you will like this book.