All Myeong Seong-a wants to do is spend her life playing video games. Unfortunately, after defeating a streamer in an online game and taking his money, she realizes that he is actually a boy in her class named Kang Hanjun, who also happens to be a terrifying delinquent! Determined to keep her identity a secret, she decides to request a class transfer, only to run into An Tae-ui, another classmate who looks exactly like her game character! Can she spend time with Tae-ui while keeping Hanjun from discovering who she really is?