You and Heeseung met at the beginning of high school, because you were the only one he could talk to. It's been 3 years, and it just so happens that you're always in the same class. You are always together, laugh together, flirts with each other, and many people even think that you are dating, even though you are not. You guys act like a couple, even though you're not.

Until finally, in 12th grade, a prom will be held to celebrate graduation. Long before that day, Heeseung had promised you that he would be your partner at the prom. he talks about prom, and what he plans to do with you when he graduates from high school.

However, for some reason, a sudden change happened to him. Heeseung suddenly became colder, and indifferent to you. It was as if he was playing tug-of-war with you. He becomes less responsive, and even forgets that you are the one talking to him. As if he 'lost interest' in you. everything became awkward, and you guys rarely or even barely spoke in the past few months. even if you did, it was only when necessary.

until finally, when prom day arrives, you are forced to be alone without a partner among thousands of students who each have their own partners. You wanted to look for any of your friends, but you couldn't find them anywhere. Apparently Heeseung was behind you, far behind you. He's been watching your movements all along. Until when you chose to leave the room, to get some fresh air, there you met Heeseung leaning against the wall, as if he already knew that you would also leave the room. "it's sucks being in there, huh? It took 30 minutes, until you could get out of there, and be with me here now."