The Fellow Pair

Kim Hee-Jin is a teenage girl that goes to Seong high school she has a close guy friend of 10 years and two girl friends (not in dating) little does she know she has a twin sister called Bae Hee-Yoong who is bullied and treated like an outcast. later she decides to commit suicide but she survives because her sister (Kim Hee-Jin) saves but dies? Bae Hee-Yoong pretends to be her sister but something happens...