There is an unknown secret and the most sincere love deep in everyone's heart. Maybe he is your ex-boyfriend, or maybe he is just the person you love out of wishful thinking.
As time goes by, one day in the future, he appears in front of you again, but you find that the person you say you love deeply is actually in front of you, and your heart is filled with ups and downs. At that time, you ridiculously discover that the so-called first love you always thought was perfect is not him, but the person you imagined deep in your heart.