You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfics, including Mark X Ethan ones. Just search for their names in the search bar, and you'll likely find many different stories.
Another place is FanFiction.net. There are also quite a number of Mark X Ethan fanfics there. However, the quality may vary, so you might need to read the summaries and reviews before choosing one to read.
Chapter 506, "The Female Devil Can Die", is the clearest early answer because it turns Zhuola's situation into a concrete plot event.
Look to Chapter 1 for the clearest answer. It begins with Jiang Li, I'm warning you, don't set your sights on Yinwan anymore, or..., keeps building through Following a bout of tinnitus, she struggled to open her eyes and finally..., and lands on Yet before she had the chance to teach her a lesson.
Chapter 402, "The Survival Game Officially Begins!", is the clearest early answer because it turns Shiguang's situation into a concrete plot event. The setup is What kind of face was it?, but the pressure keeps building through Skin cold and white like jade, features delicate as if cast from a....
Chapter 750, "A Complete Beast!", is the clearest early answer because it turns Complete Beast's situation into a concrete plot event. It opens with Shu Yan glanced at Jiang Li with disbelief and then fell into deep...
Chapter 599, "The Weather has Cooled Down, the Merchant Should Go Bankrupt", is the clearest early answer because it turns Dad's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Shang Zhenhe continued, "Shaojing is really out of line, leaving a...
Chapter 516, "Choosing You as an Undercover Agent is Pretty Stupid", is the clearest early answer because it turns Shang Shuyue's situation into a concrete plot event. Early on, Why are you skulking around and observing us?" Jiang Li cut straight....
Chapter 589, "Green Tea! Green Tea! Damn Green Tea!", is the clearest early answer because it turns Mr's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Thinking of this, Zhao Lang gave a slight smile, "Alright, pedaling...
Chapter 683, "This is where you will be filming from now on!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The Capital had entered winter by November.
Chapter 722, "It's Time to Tell Him the Truth", is the clearest early answer because the hidden truth stops feeling like mere subtext. Early on, The comment section was also in shock.. By the end, This was also the first time his face had appeared so distressed..
Chapter 583, "Making a Fool of those Big Shots!", is the clearest early answer because it turns Senior Brother's situation into a concrete plot event. The chapter gives readers a real answer by opening on Days before, Jiang Li had predicted that today would bring a great...