Ji-Eun an excellent student, who is good at both academics and sports.  Social butterfly, fare skin, and long black hair.  She wonders why she can't get a guy.

She attents the same school as Block B with her best friend Kaya.  Kaya likes U-Kwon (who doesn't) and Ji-Eun's type is Bbomb.

Recently, U-kwon broke up with his girlfriend, and Kaya sees this as an opportunity to be his girlfriend.  But she is too shy and can't say what she wants.  So she writes him a letter and he mistakingly thinks its Ji-Eun's doing.

U-Kwon takes an interest in Ji-Eun.