One plotline could be that his sister is being controlled by an enemy. Naruto has to fight her to break the control. He uses his Nine - Tails chakra to overpower her and then uses his talk - no - jutsu to bring her back to her senses, thus defeating her in a sense.
Perhaps Naruto's sister challenges him for the title of Hokage. In the ensuing battle, Naruto shows her that his experience and his connection with the village are far stronger. He uses his Shadow Clones to outmaneuver her and his Rasenshuriken to prove his superiority in combat, resulting in her defeat.
One possible plotline could be that Lemon has some unique ninja abilities that Naruto discovers, and they train together to become stronger. Maybe she has a special chakra nature that Naruto has never seen before, and they figure out how to use it in combat.
A plotline might involve Naruto starting to act out in negative ways to get his parents' attention. He could start getting into trouble at school or in the village. Maybe he would start to explore his own powers in secret, away from his family, and discover some unique abilities that he then uses to show his parents what they've been missing. Also, there could be a plotline where Naruto tries to build a relationship with his sister in secret, hoping that through her, he can get closer to his parents.
Perhaps there could be a plot where Naruto's twin sister gets into some kind of trouble, like being kidnapped by an enemy ninja clan. Naruto then goes on a desperate mission to rescue her. During this time, he realizes just how much she means to him. He uses all his skills and the power of his friends to get her back, and in the end, their bond becomes even stronger.
One possible plotline could be that Naruto's family is in a difficult situation and they believe they can only support his sister. So, Naruto is left on his own. He then has to struggle to survive in the ninja world without the support of his family. He might become more independent and self - reliant, forging his own path.
A possible plotline is that Naruto tries to hide the abuse from his friends and the village. He is afraid of being judged or rejected if they find out. However, as time goes on, the signs of abuse become more and more obvious. His friends start to suspect something is wrong and eventually, they discover the truth. This could lead to a series of events where Naruto's friends try to help him, and Naruto has to learn to trust them and accept their help to heal from the trauma of the abuse.
Well, one way could be if Naruto has some new, super - powerful jutsu that he's developed. Maybe he's found a way to combine his Sage Mode with his Nine - Tails chakra in a completely new and unexpected way that gives him an edge over Hashirama.
One plotline could be that Lemon discovers a hidden power within herself that is related to an ancient Uzumaki clan secret. As she tries to master this power, she has to keep it a secret from the wrong people in the village who might misuse it. Along the way, she gets help from unexpected allies like Shikamaru, who uses his intelligence to guide her in understanding the power better.
One plotline could be that Naruto was mind - controlled by a powerful villain. He wakes up to find he has killed his clan and has to deal with the shock and guilt while also trying to clear his name.
One possible plotline could be that Naruto's sister has a special power or ability that Naruto has to protect her from those who would misuse it. Another could be that they are both on a journey to discover their family's past together.
One possible plotline could be that Naruto is under some sort of dark magic or mind control. Maybe an enemy has found a way to manipulate his actions and make him turn on his friends. Another could be a situation where Naruto is tricked into believing his friends are actually enemies in disguise. For example, if there was a powerful genjutsu that made him see his friends as threats to the village.