How does a girl turns into cat story usually end?

She probably has to adapt to moving around on four legs instead of two. Her perspective of the world also changes. Things that were easy to reach as a human are now out of reach or difficult to access.

Well, often in such fanfiction, the change might lead to new relationship dynamics. Sasuke as a girl could have different interactions with Naruto, for example. Maybe there would be more emotional and less combative exchanges at first. The story could explore how Sasuke deals with this new form and the reactions of other characters in the Naruto universe like Sakura, who might be jealous or more protective.

It could end with her realizing she needs to make a change and starting to exercise and eat healthier, and gradually losing the weight she gained.

It could end with them falling in love and getting married. They build a life together, start a family, and are happy ever after.

It can also be used to explore different aspects of the characters. The girl in cat form might have different behaviors and instincts that play into the relationship. Maybe she's more playful or shy as a cat, and this affects how the romance develops. The transformation can also create some comical situations, like when she accidentally knocks things over in cat form, which can be a source of bonding between the characters.

Often, it ends happily with the two of them overcoming all the obstacles and getting married. They prove that love is more important than money or social class.

Often, they either change for the better together and build a more positive life. For example, they might start a small business together using their street - smart skills in a legal way.

Often, they end up together happily. Despite the initial differences in their economic status, they overcome all the obstacles like family disapproval and social pressure, and their love prevails.

Well, it might be due to a powerful magical artifact. She could have accidentally touched or used an enchanted item that had the power to turn humans into animals, like a cursed amulet. Or, in a more spiritual sense, it could be a connection to a spirit world where cats are guardians and she has been chosen to take on that form for a special mission. There could also be a deal made with a supernatural entity that she has to fulfill, and the transformation is part of the deal.

Another reason might be related to some kind of spiritual or mythical connection. In certain mythologies, there are beings that can transform between human and animal forms. She could be related to such a being, and due to some trigger, like reaching a certain age or entering a specific place, she turns into a cat.