Well, in many 'joker x oc fanfic' works, the OC could be a psychiatrist who tries to understand the Joker. This creates an interesting dynamic as the OC is drawn into the Joker's mind games. Some fanfics also show the OC having some sort of special ability that either attracts or repels the Joker, leading to intense and often unpredictable interactions.
A practical answer is Chapter 29, because it turns the idea into a concrete scene. The chapter opens with Big brother, it's me..." The shadow suddenly spoke and it was Jiang..., adds pressure through Learning from experience, Jiang Yan chose to stand next to Lin Manru this..., and ends on Big.
A practical answer is Chapter 86, because it turns the idea into a concrete scene. The chapter opens with After over an hour of fuss, it was finally time to eat., adds pressure through Having tasted the tomato and eggs again, Wen Jiaojiao sighed in relief,..., and ends on But then her expression.
Look to Chapter 39 for the clearest answer. It begins with Qi Tianyu had been looking forward to watching Jiang Li's drama unfold., keeps building through But to his surprise, Wen Jiaojiao, who seemed to possess some strength,..., and lands on His original intention was just to make Jiang Li back.
A practical answer is Chapter 54, because it turns the idea into a concrete scene. The chapter opens with Five minutes later, the people of Chixia Village, who had received the..., adds pressure through Even the trolls in Jiang Li's live stream room were not very active..., and ends on She was.
A practical answer is Chapter 43, because it turns the idea into a concrete scene. The chapter opens with The moment He Yun willingly sat next to Jiang Li and even took off his..., adds pressure through VIP lounges and business class still count as transformation?, and ends on Just as she turned.
If you want the clearest chapter reference, go to Chapter 15. Early on, Jiang Shixu woke up from those nightmares filled with blood and darkness,...; later, the chapter leans on The two sleeping pills he took in the evening had left him with a....
If you want the clearest chapter reference, go to Chapter 11. Early on, After a meeting, Shang Shaojing pinched the bridge of his nose, tired, and...; later, the chapter leans on How is it going with the Jiang Family?" The assistant looked troubled and....
If you want the clearest chapter reference, go to Chapter 1. Early on, Jiang Li, I'm warning you, don't set your sights on Yinwan anymore, or...; later, the chapter leans on Following a bout of tinnitus, she struggled to open her eyes and finally....