HE USED TO BE SUCH A SWEET GUY??? WHAT THE HELL HAPPENED TO HYUN
spoiler He discovers how he enjoy tormenting Sui. They became toxic affair but He just obsess over Sui.He thinks He is know Sui much better than everyone else and He want to be pain.
HE USED TO BE SUCH A SWEET GUY??? WHAT THE HELL HAPPENED TO HYUN