One possible plotline could be a tournament - style event where characters from Naruto and My Hero Academia compete against each other. This would allow for exciting battles as the different powers and abilities are pitted against one another. For example, Naruto's shadow clone jutsu against Bakugo's explosions.
Another plotline could be a mentoring - type of story. Where some of the more experienced Naruto characters like Kakashi mentor the younger My Hero Academia students. This could help the students develop new skills and perspectives, while also creating some interesting cultural exchanges between the two universes.
One possible plotline could be that Naruto mistakes a character from My Hero Academia as a threat to the ninja world. So, he banishes them to prevent any potential harm. For example, if he sees a powerful quirk user like All Might in the wrong context, he might think they are a new kind of enemy.
One possible plotline could be a story where Naruto is transported to the world of High School DxD where Grayfia exists. They meet and initially have a misunderstanding due to their different backgrounds, but then gradually come to understand each other and work together to solve a mystery in that world.
One possible plotline could be about the next generation of heroes. Maybe the children of the current heroes are starting their own hero journey at UA High. They might face new villains with even more complex quirks.
In some My Hero Academia lemon harem fanfiction, a plotline might be centered around a character who is an outcast in society due to their quirk but is actually really powerful. They end up at UA and the female characters see the good in them. The girls might start to help the character control their quirk better, and during this process, feelings develop. Another type of plot could be that there's a character who can travel between different dimensions, and in one of these dimensions, they meet the female characters in a different context, like a post - apocalyptic world where they have to rely on each other to survive. This creates a bond that turns into a harem - like relationship.
One possible plot could be that Naruto is somehow transported to the My Hero Academia universe. He meets Midnight and they team up to train students in a new, combined style of combat that incorporates Naruto's ninja skills and the quirks of the My Hero Academia world.
A plotline might involve Ryuuzetsu and Naruto forming an unlikely alliance to fight against a common enemy. Maybe there's a new threat that neither the Leaf Village nor the Hidden Mist Village can handle alone. They would have to combine their skills and learn to trust each other. Ryuuzetsu could teach Naruto some of the Hidden Mist's combat strategies, and Naruto could share his never - give - up attitude with Ryuuzetsu.
One plotline could be them training together. Naruto, with his unique skills and experience, could help Hanabi improve her own abilities. They could exchange techniques and learn from each other. For example, Naruto might show Hanabi how to better control her chakra, while Hanabi could teach Naruto some precision - based moves that are common in the Hyuga clan.
One possible plotline could be them working together on a complex mission. Shikamaru's strategic mind and Hinata's Byakugan abilities would make them a great team. They could face various challenges during the mission and in the process, their respect for each other grows, leading to a deeper friendship.
One possible plotline could be that Naruto, in his travels, stumbles upon an elf realm. There, he meets an elf and they develop a romantic relationship with some 'lemon' elements like passionate encounters. Another could be that an elf is brought to the Naruto world and they have to navigate their cultural differences while falling in love in a more adult - themed way.
Perhaps in a 'naruto x tifa lemon fanfiction', Tifa could be transported to the Naruto world. She might initially struggle to adapt to the ninja - based society. Naruto, being the friendly and helpful character he is, would assist her. As they spend time together, they start to understand each other's strengths and weaknesses, which could lead to a deeper connection. However, they also have to deal with the politics and power struggles in the Naruto world that might threaten their relationship.