For anyone reading this after watching the kdrama and are confused abt names. The second names of the characters are the same in the kdrama, so gray yeon = yeon sieun, ben park = park humin/baku, alex go = go hyuntak etc. Also the manhwa has a few characters who werent adapted like gerard jin/jin gayool. So if theres a character u dont recognise its most likely because they weren't adapted.