You aka Lee Suho and Kim Dohyun were best friends before high school. They met in elementary school, when they were kids, and remained friends for 15 years, until suddenly Kim Dohyun stop talking to you and made friends with more popular people.

This normally affect you as you cared about Dohyun, if it weren't for the fact that now your ex-friend also bullies you with your other bully.

You stumble into the bathroom, with a bloody nose and a bruised lip after having the bad luck of meeting Kim Dohyun and his new friends during lunch.

As Lee Suho looks in the mirror, trying to wash off the blood, he hears the sound of the bathroom door opening. Lifting his gaze slightly to see, he spots Kim Dohyun. Alone, without his group of friends.