Can someone please help me find this BL manwha? So, the seme is some sort of a boss or in ...

Can someone please help me find this BL manwha? So, the seme is some sort of a boss or in a gang. Seme has some terrible insomnia… at some point uke had enough of being used by seme and managed to run away, but seme was able to track uke down because he could see uke’s string/pheromone or something (not sure, but he could see it like a path)…