You can start by looking on fanfiction.net. It has a vast collection of Fairy Tail fanfictions, including those about Mirajane and Laxus. Another great place is Archive of Our Own (AO3). Many talented writers post their works there, and you're likely to find some interesting stories about this pairing.
Some dedicated Fairy Tail fan communities on Reddit might be a good source too. People often share their own fanfictions or recommend ones they've read. You can join relevant sub -reddits and ask for recommendations specifically for Mirajane and Laxus fanfictions.
Look to Chapter 36 for the clearest answer. It begins with But soon, people began to question the authenticity of Jiang Li's bare..., keeps building through After all, these days, faux bare-faced makeup can be indistinguishable..., and lands on After swallowing the food in his mouth, he hurriedly.
Chapter 744, "Dig Three Feet into the Ground to Find Her!", is the clearest early answer because it turns Xing Mingfei's situation into a concrete plot event. A useful checkpoint is the way the scene starts with What?!" Wen Jiaojiao directly questioned out loud, "On what basis are...
If you want the clearest chapter reference, go to Chapter 10. Early on, Qiao's shocked face struggle to recover, Lin Manru also tasted for the...; later, the chapter leans on Jiang Li nodded with a smile, seemingly approving of Lin Manru's words and....
Chapter 39 is the strongest chapter-level answer because it starts from Qi Tianyu had been looking forward to watching Jiang Li's drama unfold. and follows through on His original intention was just to make Jiang Li back off gracefully,....
The best chapter pointer here is Chapter 1, "I'm Not Interested in Uncultured Men". It opens with Jiang Li, I'm warning you, don't set your sights on Yinwan anymore, or... and closes on Yet before she had the chance to teach her a lesson, the male lead arrived....
Chapter 932, "Gu Pansheng [Extra · Main Character Chapter]", is the clearest early answer because it turns Hua University's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Gu as in 'Gu Pansheng,' Pan as in 'Gu Pansheng.' I am four years old...
Chapter 10 is the strongest chapter-level answer because it starts from Qiao's shocked face struggle to recover, Lin Manru also tasted for the... and follows through on Who was it again saying that the Jiang Family's tradition was lacking,.... The payoff is that the chapter closes with "She...
A practical answer is Chapter 1, because it turns the idea into a concrete scene. The chapter opens with Jiang Li, I'm warning you, don't set your sights on Yinwan anymore, or..., adds pressure through Coming to his senses, he also switched to a kindly smile, "Alright, girl,..., and ends on Yet.
A practical answer is Chapter 25, because it turns the idea into a concrete scene. The chapter opens with Therefore, from his childhood, Jiang Shixu had felt an extreme aversion to..., adds pressure through When she saw the woman behind the desk, she smiled and said, "Look who..., and ends on.