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.
The main antagonist could be an ancient snake spirit that was bound to the contract. This spirit might not like the idea of Naruto, a human, having control over the powers of the contract. So it tries to possess Naruto or drive him insane by constantly whispering dark thoughts and trying to make him use the snake powers for evil. It would be a battle of wills between Naruto and this malevolent spirit.
Yes, I recommend " Naruto: The Thousand Hands Bearing Leaves ". This book mainly narrates the growth process of the Thousand Hands Clan and the history of resistance. With the Thousand Hands Bearing Leaves as the main character, I recommend it to you. I hope you will like it.😋
The key is to be creative and unique. Use vivid words or a play on words. Maybe start with a question like 'What Lies Beyond?' or a powerful statement like 'The Final Stand'. Just make sure it makes people curious and eager to read the story.
You could start by thinking about the theme or nature of the gang. Maybe draw inspiration from their activities, location, or some unique trait. For example, if it's a gang of tech hackers, use terms related to technology in the call sign.
A sign could be that they always make you do things for them without any reciprocation. What you can do is to distance yourself a bit. Don't be so available all the time.