One possible plot could be that the kyuubi's growth is a result of an experiment gone wrong. Some rogue ninja scientists might be trying to harness the power of the tailed beasts and they accidentally create a situation where the kyuubi gets bigger. This would not only endanger the kyuubi itself but also the entire Hidden Leaf Village and other surrounding areas. So the characters would need to figure out how to reverse the experiment and save the day.
Well, in the 'kyuubi gets bigger' fanfiction, it could be related to a dark magic or an ancient curse. For example, an evil sorcerer might cast a spell on the kyuubi, making it grow uncontrollably. As it gets bigger, it could start to disrupt the balance of nature in the ninja world. And Naruto and his friends would have to find a way to break the spell and stop the kyuubi from causing more chaos.
The best chapter pointer here is Chapter 222, "Oh, Miss Jiang Has Drawn It". It opens with How come they're even live streaming in a reality show?! and closes on She was certain and sure that she saw scheming in them..
A practical answer is Chapter 179, because it turns the idea into a concrete scene. The chapter opens with Everyone originally had no expectations for the gifts that Su Yinwan..., adds pressure through He start going down the comedic route?] [I seriously suspect the Movie..., and ends on I've been.
The best chapter pointer here is Chapter 164, "Congratulations to Jiang Yan for scoring one point!". It opens with Damn, the production team is so shady, they're still doing a live... and closes on The current Jiang Li did indeed make him see her in a new light, to some....
The best chapter pointer here is Chapter 186, "The Goddess Who Can't Stand the Smell of Pig Manure". It opens with Seeing Wen Jiaojiao bravely entering the pigsty, Jiang Yan couldn't stay... and closes on And in the instant she fell, the red rope tied to Jiang Yan also broke,....
Chapter 167 is the strongest chapter-level answer because it starts from By the experimental field, Qi Tianyu was quite helpless as he watched Wen... and follows through on Even when getting into the car, Qi Tianyu was still savoring the moment in....
A practical answer is Chapter 169, because it turns the idea into a concrete scene. The chapter opens with Everyone: "What?!" Seeing the shocked and bewildered expressions on their..., adds pressure through If you signed up, be ready mentally.] [Exactly, supporting the sister..., and ends on Wen.
Look to Chapter 204 for the clearest answer. It begins with Su Yinwan didn't move, but Director Qian turned around, ran to the..., keeps building through Seeing this, Su Yinwan clenched her fists in frustration., and lands on Jiang Li immediately met their gaze, her icy and indifferent look....
A practical answer is Chapter 175, because it turns the idea into a concrete scene. The chapter opens with Wen Jiaojiao's eyes nearly rolled back into her head., adds pressure through He couldn't say anything;
Look to Chapter 188 for the clearest answer. It begins with With a "snap," the pencil Jiang Cheng was using to draw broke on the paper., keeps building through He looked up, the cold glint behind his glasses sending shivers down one's..., and lands on I haven't even said anything yet, Zhou, why so.
A practical answer is Chapter 203, because it turns the idea into a concrete scene. The chapter opens with Ah Fu knew he might have made a mistake, and after glancing at Su Yinwan,..., adds pressure through Why should she take orders from her?, and ends on Su Yinwan's expression stiffened for a.