Lia is a sad & lonley girl who has recently broken up with her boyfriend... Mark is a rich & happy,but not so social boy... What happens when these two idols met accidentally,& up a friendship? What can Mark do when he sees Lia more than a friend,but she is too scared to date again?

Based on the lyrics of Kim SungGyu's hit song "True Love", Julia finds a letter at her doorstep. Curious about its contents, she opened it, only to find herself reminiscing about the good times she spent with SungGyu.