Summary:

Tsubasa and Arisa are twin sisters but due to their parents' divorce, they hadn't seen each other for years. But after three years apart, they can finally be together again. One day Arisa
and Tsubasa decide to switch identities and Tsubasa attends Arisa's classes. She is really excited to realize that her twin sister has so many dear friends, a cool boyfriend and even hot guys in her class, unlike her, who is always getting into trouble. But Tsubasa doesn't know anything about her twin sister's school. She doesn't know their secrets, and most of all, she doesn't know anything about the real Arisa.

(Summary by Vally- Proofread by Xzel)