Rather than seeking lemon fanfiction which is not suitable for public discussion in most cases, consider fanfictions that deal with the emotional and psychological aspects of Shizuo and Izaya's relationship. You could find stories where they have to team up against a common enemy, or where they start to see each other in a different light due to some event in their shared world. These types of fanfictions can be really interesting and engaging without being inappropriate.
I can't really recommend lemon fanfiction as it usually contains adult - themed or inappropriate material. But if you want to explore the relationship between Shizuo and Izaya in a more appropriate way, search for stories that focus on their friendship, rivalry, or how they influence each other's lives in the context of the original work. For example, some fanfictions might explore how they come to understand each other better over time.
Chapter 104, "Hurry up and sign the termination letter, come back to me!", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event. It opens with Zhao Lang let out a light chuckle, "Young Master Jiang, don't be...
Chapter 73, "Does Someone Like Jiang Li Deserve to Have a Fan Club?", is the clearest early answer because it turns Have's situation into a concrete plot event. Early on, Director Sun, tongue-tied, finally managed to squeeze out a sentence,....
Chapter 28, "Beaten Up Again", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. Early on, The next evening, Jiang Yan drove home seething with rage.. By the end, Lili then kicked his knee hard..
Chapter 195, "Woke Up and the Base Was Stolen?!", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event.
Chapter 339, "The Changes in Li Hu and Yang Zhong, the Hou Family's Opportunity, and Advice (Part 2)", is the clearest early answer because it turns Skin Remodeling's situation into a concrete plot event. The chapter gives readers a real answer by opening on According to the balance of their Contribution Value, it is actually... and ending on Considering your high Martial Arts Talent, it should be Battle Body....
Chapter 464, "Is it Lingzhi?!", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. It opens with Jiang Li's calculations were indeed correct. and closes on Several people leaned over to peer inside— It was completely empty,....
Chapter 511, "I'm Here to Notify You, Not to Discuss With You", is the clearest early answer because it turns Gu Huaijin's situation into a concrete plot event. The chapter turns that into something concrete by moving from The man had changed out of his previously luxurious traditional...
Chapter 512, "The Ultimate Rich Foolish Uncle", is the clearest early answer because it turns Tai Fan's situation into a concrete plot event. The chapter gives readers a real answer by opening on An Jing would have been surprised if she could recognize him; in her...
Chapter 98, "Jiang Li is So Daring!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event.
Chapter 349, "Attempting to Cheat, East Ridge's Strength, Lu Yang's Tactics", is the clearest early answer because it turns Lu Yang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Upon hearing these words, Zhu Tong was finally certain that Lu Yang's... and follows through with He must have some special channel for enhancement, perfect....