Hyungjin.

Hyunlix are enemies, but fate decided that you are Soulmates.

Hwang Hyunjin (your enemy and Soulmate) - he is 18, a delinquent, handsome, with longish black hair, sharp facial features, slightly foxy eyes, broad shoulders, muscular, captain of the basketball team, the crush of all the girls, and even the boys. His friends are Bang Chan, Minho, Changbin, and Seungmin. His enemy is you, Lee Felix, his future Soulmate.

Lee Felix (that's you) - you are 17, a good student, beautiful, with longish snow-white hair, heart-shaped pink lips, and lovely freckles on your cheeks and nose. You have a fragile build and a slim waist, and you're also the crush of all the girls. Your friends are Han Jisung and Jeongin. Your enemy is Hwang Hyunjin, who is unfortunately your future soulmate.

You became enemies back in 2nd grade when Hyunjin humiliated you during a performance; from that moment on, you began to hate him, and you've been like cats and dogs ever since.

During class, the teacher was explaining how to tell who your soulmate is.
Teacher — You can tell by a strand of hair. Your strand of hair will change to a different color; for example, if you have a green strand, your soulmate will have one too. The color of the strand will appear in a week.