"Changmin Oppa Marry Me When we grow up okay?" an 5 year old girl said to her friend "sure  changmin oppa will marry you" the guy said

"why did you take it seriously ? that promise is when i was just 5 years old" 

Characters :)

Jessica Jung - She's Not taking seriously on there studies, she was popular in middle school until college of course donghae's friend 

Changmin Max Shim - A teacher he never let go jessica in her heart since they we're a child what if jessica let go of him and jessica  have a relationship with donghae already? is he going continue being a rude to his students?

Donghae Lee - He is crushing jessica since that they meet each other on middle school where ever jessica go he always follows, he won't give up on jessica but one time he need to move on states what if he fall inlove with another woman ? is he going to let go jessica ?