Many years ago, one day before graduating from elementary school, a girl wrote the words "I love you" on the blackboard in order to confess her love to a boy in her class who she had a crush on for a long time. As a result, he was ridiculed and insulted by the whole class. They pushed the girl to the ground and prevented her from erasing the chalk on the blackboard, intending to embarrass the girl in front of the teacher.
Just when the girl felt desperate, a boy walked into the girl's class. He resolved the girl's crisis and told the classmates: Confessing one's feelings is not a stupid act, but the most respectable courage in the world.
Many years later, the girl and the boy meet again. But they always pass by each other when they are about to express their feelings. They thought it was all God's will, but they didn't know until the end that there was another story behind their story...