.

Tiffany Hwang- a member of the best female K-POP group of Korea

The youngest daughter of Stephen Hwang.

she is known as bubbly, noisy and stubborn by her co- members 

Unknown by the others Tiffany is a secretive person. The family has a secret that must be protected. SONE company knew about it so they decided to keep Tiffany all alone by herself in a room not letting anyone stays with her.

Kwon Yuri- the only child of a secret multi-billionaire of Korea. A member of Girls Generation like Tiffany. Nobody knows that Yuri is a wealthy person not even the SONE company.

She will play a very important role in Tiffany's secret.