The soulmate serum was released to the public two years after Lily was born. So, she didn't really know of a life outside of the concept. Her parents often read her fairy tales growing up, and she would change the story a bit. The prince in the story wasn't just the prince, he was the princess' or female protagonist's soulmate. So, her parent's also started reading true soulmate stories from online articles and the newspaper. Needless to say, Lily had been looking forward to getting the serum injection and discovering who her soulmate was. But, instead of one soulmate she ends up with five. And those five happen to be members of the Kpop group, Alluvion. How is she going to handle a relationship with five men? How is she going to handle the fame by association? She doesn't really know, but they are her soulmates and she isn't about to turn her back on destiny. Alluvion's Water Lily is loosely based on my BTS Fanfic Encoded in Our DNA. So, if you have read that you might see some similarities. It is mostly based on the framework of the soulmate serum idea however. So, mostly its own story. It's a reverse harem. Meaning she will have a romantic relationship with five different men.