It's late in the evening, and Myung Sik has just returned from a minimarket where he purchased some snacks for himself when he notices a familiar girl in an empty alley. Sun Bin is being pursued by a man in his early twenties. The man appears to be flirting with her, while the girl appears to be troubled by it. He tries to grope her arm seductively and makes a sexual advance towards the shy high school girl.

Myung Sik, who watches everything, despises the view. He just wants to help Sun Bin and beat that man, but as he runs for her, Sun Bin grabs the man's arm and...