One summer night 12 years ago, on a playground... 

“Let’s break up.”

19 years old. Kang Chul-In, who was at the end of his teenage years spoke towards a girl. 

“Break… up? U-Us?”

17 years old. The girl, Han Ye-Sun, was so surprised that she couldn’t speak properly. 

“Yeah, let’s break up.”

“Why?”

Yes, why? Kang Chul-In and her usually couldn’t go a day without seeing each other. But he wanted to break up? Even though it was just immature love [1], it was still a sudden break-up notice. 

The reason was…

“I found someone else who’s way better than you.”

He was crying wolf. 

“Liar.”

Han Ye-Sun shook her head. 

“Oppa… are you telling me to believe that right now?”

“...”

“The lie that you found someone else other than me?”

Kang Chul-In couldn’t say anything to Han Ye-Sun’s scolding.  After all, it was a lie. Someone else? Kang Chul-In had never thought of anyone other than Han Ye-Sun. 

She was the only light in his life filled with part-time jobs and stress. 

“Tell me the real reason, Oppa.”

“I need a break…”

“Lia...