Myoui Mina was broken. She was in pain. But she knew how to hide it behind a leather jacket, cigarettes and a I-don't-good-give-a-damn attitude. Mina had a lot of anger inside of her but she had a way to get it out. And it was climbing up the rooftop at midnight and talk to no one in particular about her problems, her anger. There was no one at rooftop at midnight so it was good for her to let out her anger. She didn't expect to get an answer in return. But one day, someone talked back to her. And she was none other than Chaeyoung, her neighbor and a very shy girl in her music class.