Simple Introduction about characters

Jin Young and you are couple for 1 years back where you both are beeing friends for 3 months only right after he transfered to your school in a same class as you in senior year. You started to hit him up first. No reason why. Just because he is sincerely cute in your eyes and the girls too. You are like a little bit jealous and wanna try him as a challenge. But. The truth is he actually already have fall in love to you the moment you introducing yourself to him.