You can try looking on fanfiction websites like Archive of Our Own (AO3). There are often a lot of fan - created stories for various movies, including 'Sing'. Just search for 'Sing Ash' on the site and you might find some great fanfiction.
Fanfiction.net could also be a good place to search for 'Sing 2016 Ash fanfiction'. It has a large collection of fan - written stories. However, the quality can vary, so you may need to do some sifting through the results. But it's definitely worth a try.
Another option is to check out some dedicated movie - fan communities or forums. There are likely to be fans of 'Sing' who have either written or can recommend some good Ash - centered fanfiction. You can start by searching for 'Sing' forums and then asking about Ash fanfiction within those communities.
Chapter 815, "You've eaten through all the savings!", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Zhao Yuan was quite surprised, "Right, absolutely right, haha,...
Chapter 713, "Uncle Will Owe You for Life", is the clearest early answer because it turns Lili's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Li raised her head and was startled by Zhao Lang's smiling eyes.
Chapter 476, "Make a feint to the east but attack in the west, take something out of a bag effortlessly", is the clearest early answer because Jiang Yan gets a payoff that changes the stakes.
Chapter 613, "When a Whale Falls, All Life Thrives", is the clearest early answer because it turns Shaobai's situation into a concrete plot event. The chapter turns that into something concrete by moving from Hearing He Wen's words, Shen Lan was so excited she nearly sprayed...
Chapter 439, "Never Question Sister Li", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. It opens with There was no helping it, she brought the man here, so even if he was...
Chapter 905, "I Plan to Quit the Circle", is the clearest early answer because it turns Is's situation into a concrete plot event.
Chapter 773, "I am the Trainee Here", is the clearest early answer because it turns Shiguang's situation into a concrete plot event.
Chapter 616, "I'm Going to Save Sister Xiao Wan!", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. Early on, Since the storm had hit that morning, he had been preoccupied and out....
Chapter 537, "Ding, Jiang Cheng's affinity drops by 10 points!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. Early on, Miss Su Yinwan immediately hung her head in dejection.. By the end, In this regard, he still held a slight advantage..
Chapter 440, "You Know Fengshui Array?!", is the clearest early answer because it turns Ji Yanbai's situation into a concrete plot event. The chapter gives readers a real answer by opening on The scorching afternoon sun, wrapped with moist sea breeze, ascended...