First year in high school, a first kiss that was abruptly being stole away while reading a script. A kiss that eventually start their destiny. Or perhaps it started way before that. 

If love can change a person for the better, will hard work be paid off?  If Sunggyu can be the one that make Woohyun change, will Woohyun's effort be paid off?

"Can we start over?" Love that he wants to get back. He wants to pay back to him for the wrongs he did. He don't want to break his vow. Not anymore.