Allo, Maman !

Hanna, an overweight lip-sync artist who ghost sings for Ammy, a known pop diva, secretly likes Han Sang-jun. When Ammy humiliates Hanna in Han's presence, Hanna decides to undergo a cosmetic surgery.

A popular high school athlete and an academically gifted girl get roles in the school musical and develop a friendship that threatens East High's social order.