Jae Hae-ri was just the girl who everyone referred to as the "School Geek". In other words she's just the typical 16-year-old smart who has her nose stuck in books all day. 

But that changed when L. Joe suddenly came up to her one day and said, "You peak my interests, Jae Hae-ri."

Now, all L. Joe does is tag along with Hae-ri, bothering her each time he gets.