melodrama high school love story

plot - older sister got heart stolen by some boy, but need go to USA to heal her heart disease.
younger sister promises her to find boy since she will go to same school and give information about him to older sister.

Sadly if you watch somebody for too long it may grew into something.
From plot I wrote it may seems like here will be some sister love wars etc but nah its just plot premise and story will mainly focus on love story of younger sister.

This drama got its nice moments.

Genre - melodrama, romance, high school