The plot could involve Naruto stumbling upon an ancient colossus contract. The colossus could be a powerful being from a forgotten era. Naruto, being Naruto, would see the potential in this contract. He could use the colossus's strength to protect the Hidden Leaf. For example, when facing a powerful enemy like Pain, the colossus could give him an edge. The story might also explore how Naruto's friends react to this new power source.
Well, it could be about Naruto making a unique contract with a colossus. Maybe the colossus has some special powers that Naruto needs to defeat his enemies. He might have to go through some tough trials to seal the contract.
In this fanfiction, perhaps the colossus contract is something that was forbidden in the ninja world. Naruto discovers it by accident. The colossus could be a giant creature with abilities like super strength and the ability to manipulate the elements in a different way than normal ninjutsu. Naruto would have to keep the contract a secret at first. As he starts to master the powers from the contract, he might face challenges from other ninja villages who fear this new power he has obtained. He would then have to prove that he is using it for good and not for domination.
Maybe it's an ancient evil that was sealed away long ago and the colossus contract is the key to its release. This evil force would be the main antagonist as it tries to break free and cause chaos in the ninja world. It could be something like a powerful demon that was once defeated by the first Hokage but is now on the verge of coming back because of the colossus contract. Naruto would have to stop it with the power of the colossus.
Well, it could involve a character making a deal with a Shinigami. Maybe a ninja is on the verge of death and in order to gain some extraordinary power to save their village or loved ones, they make this contract. The Shinigami might demand something in return like a part of their soul or their future memories.
Maybe the rat contract allows the user to communicate with rats in a special way. The rats could help in battles by distracting opponents or even stealing small but important items from the enemy. They could swarm over an opponent, causing confusion.
The plot could be that Naruto signs the snake contract in a moment of desperation. For example, during a battle where the village is on the verge of destruction and all other options seem exhausted. After signing, he discovers that the snake contract gives him access to a hidden dimension filled with snake - like creatures and ancient knowledge. He has to train in this dimension to master the powers of the contract. But there are also other forces in this dimension that want to use Naruto for their own evil purposes. He then has to fight against these internal threats while also using his new - found snake powers to defend his village from external enemies.
In a world where colossi exist among humans, there is a young colossus who is different from the others. He is interested in human emotions and culture. He meets a librarian who helps him understand books and stories. Through their interactions, they develop feelings for each other. However, the society around them doesn't accept their relationship at first. But they fight for their love and gradually change the views of those around them.
One possible plot could be that Naruto discovers an ancient and forgotten summoning contract. He decides to make it his own, not knowing what kind of creatures it will summon. As he signs the contract, he is immediately transported to a strange and mysterious realm. There, he meets the initial summon, which is a powerful and intelligent being. This being tests Naruto's worthiness and eventually agrees to help him in his battles against new and dangerous foes in the Ninja world. This new summoning gives Naruto an edge in combat and also helps him gain more knowledge about the hidden secrets of the Ninja world.
Well, it could mean he gains new powers related to the monkeys. Maybe he can summon really powerful monkey-like creatures to help him in battles. For example, he might be able to call on monkeys with unique jutsu or abilities that normal summons don't have.
He could summon dinosaurs to aid him in battles. Just like he summons toads in the original story, with the dinosaur contract, he could call upon different types of dinosaurs with various abilities, like a T - Rex for brute strength or a Stegosaurus for defense.
One idea could be that Naruto is transported to the world of Shadow of the Colossus. He might mistake the colossi for some kind of powerful summons or demons. He could try to use his ninja skills like the Rasengan or Shadow Clone Jutsu to take them down. And in the process, he might learn about the unique magic or energy in that world.
Well, Naruto might gain some unique abilities from the dog contract. For example, he could have enhanced senses like better smell or hearing. Maybe he'd be able to communicate with dogs more effectively and use them in battles in new and creative ways.