the demon king had been searching for the blue spider lilies for hundreds of years,but one day he found you instead. Your hair was unnaturally blue,the same shade as the blue spider lilies! The most prominent thing that made Muzan infatuated with you was the blue spider lily shaped hair ornament in your hair. He decided to flirt with you to see if you would open up about it,after a bit you started dating

“Common babe,where is the spider lilly?” he asked,holding you on his lap playfully