Another concept could be a battle - centered fanfiction. The martial artists from Ranma 1/2 could be challenged by the Sohma family members in Fruits Basket. The Sohmas might use their animal forms to their advantage in combat, while the Ranma characters use their martial arts skills. It could be a series of battles where they learn to respect each other's abilities and in the end, form an alliance of sorts.
A great Ranma 1/2 and Fruits Basket fanfiction often has well - developed characters. Since both shows have a large cast of interesting characters, a good fanfiction will explore their personalities further, perhaps showing new sides of them. For example, how would Ranma interact with Tohru from Fruits Basket in a different situation.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. These platforms have a large collection of fanfictions for various shows, including Ranma 1/2 and Fruits Basket. Just use the search bar and type in relevant keywords like 'Ranma 1/2 Fruits Basket crossover' to find interesting stories.
One idea could be to have the characters from 'House' end up in the world of 'Fruits Basket'. Maybe House could try to diagnose the curse that plagues the Sohma family. His rational and often brusque approach would clash with the more emotional and superstitious aspects of the 'Fruits Basket' world.
Happosai from Ranma 1/2 is a lecherous old man, and his personality would be a huge contrast to the generally more moral and proper Fruits Basket characters. His presence would likely cause a lot of chaos and outrage. On the other hand, characters like Momiji from Fruits Basket are very cheerful and friendly. He could potentially befriend some of the Ranma characters like Ukyo, who also has a somewhat positive and friendly side. Momiji's carefree attitude might be refreshing to the Ranma characters who are often caught up in their own dramas. This shows how there can be both clashes and blends of personalities between the two series in a fanfiction.
One idea could be a crossover where Harry Potter accidentally ends up in the world of Ranma 1/2. Maybe he's on a magical experiment gone wrong and lands in Nerima. He could use his magic to help Ranma deal with his curse, like creating a spell to keep him from changing into a girl when splashed with cold water.
One idea could be exploring the backstories of the minor characters in more depth. For example, what was Hanajima's life like before she met Tohru? Another could be a 'what if' scenario, like what if Kyo had been accepted by his family from the start. Maybe a time - travel fanfiction where Tohru goes back in time to change some of the sad events in the Sohma family's past.
Another fanfiction concept could involve Naruto being sent to the One Piece world through some kind of strange ninja jutsu gone wrong. There, he eats a Logia Devil Fruit that allows him to turn into water. He teams up with the Straw Hat Pirates and uses his water - based powers, along with his ninja knowledge of chakra control, to help them in their adventures. For example, he could use his water form to put out fires on the ship or create water - based defenses against enemies.
An idea is for the reader to be a journalist investigating strange happenings in the town where the Sohmas live. They suspect something is up with the family and start to dig deeper. As they get closer to the truth, they form relationships with the Sohmas, especially those who are more guarded about the family secret. This could lead to a story full of mystery and self - discovery for both the reader and the Sohma characters.
One idea could be creating an OC who is a long - lost relative of one of the main characters. For example, an OC who is a cousin of Tohru. This OC could bring new family secrets and dynamics to the story.
One possible scenario in a Fruits Basket reader insert fanfiction could be the reader being a new student at the school. They accidentally stumble upon the Sohma family's secret and instead of being scared off, they offer their friendship and support to the cursed members. This could lead to a heartwarming story of acceptance and love, as the reader helps the Sohmas deal with their insecurities and the challenges that come with their curse.