Well, perhaps the fanfiction could start with Naruto feeling that there is something wrong with his connection to the Kyuubi. He then embarks on a journey of self - discovery. Along the way, he meets some mysterious characters who give him clues on how to break the 'kyuubi lemon', which might refer to some sort of blockage or negative aspect in their relationship. As he progresses, he gradually overcomes these issues and in the end, he has a much stronger and more harmonious bond with the Kyuubi, and his power increases significantly. This plot could also involve some emotional turmoil for Naruto as he battles with his inner self and tries to understand the true nature of his relationship with the Kyuubi.
In such a fanfiction, perhaps Naruto could gain the full power of the Kyuubi and use it in unique ways. He might develop new jutsu that combine his own skills with the Kyuubi's chakra. For example, he could create a super - powerful Rasengan infused with Kyuubi's chakra. And he may face new and more powerful enemies as a result of this new power. Also, his relationships with his friends and allies could be affected, as they might be in awe or a bit scared of his new - found strength.
It could be that the girl is someone Naruto has known for a long time, like a childhood acquaintance. She might have always been jealous of Naruto's growing popularity and power. So, she decides to play with his feelings. She pretends to love him and then dumps him publicly, making Naruto feel humiliated and heartbroken.
One possible plot could be that Ash accidentally breaks Jessie's prized lemon - themed item, like a lemon - shaped Pokéball or a lemon - scented accessory. This causes some tension between them, but then they end up working together to fix or replace it, and in the process, they start to understand each other better.
I'm not sure specifically as it could vary greatly depending on the author. It might be about Naruto having some sort of interaction with a female version of the Kyuubi, perhaps in a situation where he breaks some sort of bond or control related to her.
Another plot development could be the impact on the other characters in the Naruto universe. The presence of a fem Kyuubi might change how characters like Sasuke view Naruto. They could be more intrigued or even more hostile depending on how they perceive the new relationship between Naruto and the fem Kyuubi. Also, the village elders might react differently, perhaps with more fear or more acceptance, which would then influence the overall political and social situation in the village.
The plot could involve Naruto trying to gain more control over the female Kyuubi's power while in her fox form. As he gets closer to her, they start to develop feelings for each other. Their relationship could be a source of conflict within the village as some may not understand or accept it. Maybe Naruto has to protect the female Kyuubi from those who want to harm her because of her power.
In this 'naruto breaks succubus fanfiction', perhaps Naruto has to face the succubus in a battle of wills. He might draw on his experiences with difficult opponents in the original Naruto series. His strong sense of friendship and loyalty could give him the strength to break the succubus's hold. For example, if the succubus tries to use his friends against him, Naruto's unwavering belief in his comrades could be his key to victory.
Well, it could be about Naruto accidentally breaking something precious of Tsunade's, like a family heirloom. This might lead to a series of events where Tsunade is initially angry but then Naruto makes it up to her in some heroic way, perhaps by going on a difficult mission for her.
In this fanfiction, perhaps Naruto breaks Kaguya by outsmarting her. He could use his quick thinking and knowledge of her weaknesses. He might form alliances with other characters in ways that give him an edge over Kaguya, and then use his signature Rasengan in a new and unexpected way to break her power.
One possible plot development could be Naruto using his new jutsu to break Yugito free from an enemy's trap. Another could be that Naruto's words break Yugito's negative mindset.