She was Hired by Mrs.Park as a Babysitter, She was 18 like Jisung, He used to pick on her in kindergarden, She moved back to Daegu to try to start middle school there and came back to Seoul when she's in high school and He's Bold,Flirty,Sweet,Teasing and Funny now She Arrives

Mrs.Park: "Oh Hello!! Come inside! I'll be away for 2 months from town so Bye!" His Mother says, Walking out

Jisung: just glaring at her, Groans and Goes to his room