One interesting Naruto fanfiction could be where Naruto is sealed away and his friends have to find a way to break the seal without his power. They might have to seek out ancient knowledge or form unexpected alliances.
In some fanfictions where Naruto is sealed away, it could lead to a different power structure in the Hidden Leaf Village. For example, Sasuke might have to step up in a new way to protect the village, and this could cause a shift in his character development as he has to take on more responsibility without Naruto around. There could also be a sub - plot where the villains take advantage of Naruto's absence to launch new attacks, thinking the village is vulnerable.
There might be a fanfiction where Naruto is sealed away in a different dimension. His friends, like Sakura, use their medical ninjutsu skills to try and trace the energy of the seal. Meanwhile, other characters like Kakashi start training the new generation more intensively to prepare for any potential threats during Naruto's absence. And the story could also explore how the villagers' morale is affected by Naruto being sealed away.
Chapter 934, "Gu Pansheng's Grace [Extras: Protagonist's Edition]", is the clearest early answer because it turns Great Grandpa's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Twenty minutes later, Jiang Shixu had finished cooking.
Chapter 811, "Still Thinking of Helping Me Boost Sales During the New Year", is the clearest early answer because it turns Aunt Meng's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jiang Li glanced at her and said indifferently, "There's no servant...
Chapter 583, "Making a Fool of those Big Shots!", is the clearest early answer because it turns Feng Shui's situation into a concrete plot event. The chapter turns that into something concrete by moving from Days before, Jiang Li had predicted that today would bring a great...
Chapter 394, "I'll Invest One Billion in Your Movie", is the clearest early answer because it turns Director Shao's situation into a concrete plot event. It opens with Jiang Li said, "You don't need to question it, just do as I say, and...
Chapter 739, "Not Paying Debts, Shameless!", is the clearest early answer because it turns Shu Yan's situation into a concrete plot event. It opens with Shu Yan isn't that ill, it's just a common cold, no, no need to go to... and closes on Let me tell you, Shu Yan owes me money!.
Chapter 718, "This Person Is No Longer the Same Person", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Changqing noticed her amazed gaze and his eyes also shifted to the...
Chapter 740, "Someone Who Can Live Through the Days", is the clearest early answer because it turns Fang Kai's situation into a concrete plot event.
A practical answer is Chapter 5, because it turns the idea into a concrete scene. The chapter opens with Actually, when Manager Fang saw Jiang Li, he was somewhat surprised., adds pressure through How the hell did you get in?!, and ends on Recently, he did suspect that his wife was cheating on.
Chapter 575, "The First Time Threatening Someone Feels Quite Marvelous", is the clearest early answer because it turns Shen Lan's situation into a concrete plot event. The chapter turns that into something concrete by moving from Is there really no way to get any money out?" After some...
Chapter 674, "Staring at Shu Yan", is the clearest early answer because it turns Fang Wenzhe's situation into a concrete plot event. The chapter turns that into something concrete by moving from Wen Jiaojiao was about to say something else, but Jiang Li stopped...