This story ciculates around Choi Soo Jin (Kim Taeyeon) who lives with her protective, handsome and famous pianist, Choi Si Won. It shows how she handles her tragic life with a little bit of music, theater, friendship, family and love.

---------------------------------------------------------------------------------------

Kim Taeyeon / Choi Soo Jin

A 23 year old college student who majors in Theater Art lives with her brother, Choi Si Won. Although she's usually very sarcastic but bubbly, fun and weird, she has a dark past.

Choi Si Won

Si Won lives with her little sister Choi Soo Jin, and he's a famous pianist. His best friend is his sister, the only person he could count on. He's kind hearted, handsome and rich. Everyone loves and him and wants to be like him but his only focus is on his career and his little sister.

Cho Kyuhyun

He's usually quiet around people he doesn't know, but when he gets comfortable around someone, he's very loud and mischievous. He's an aspiring pianist, and his idol is Choi Si Won.

Hwang Mi Young (Tiffany)

Taeyeon's best friend. She's always there for her and takes care of Taeyeon.

Lee Dong Wook

A medicine professor who works in Taeyeon's college. Also gives lectures in History and Physics. He's handsome, very funny and really nice.

Kim Junsu

He's the group leader of the Theater Department. Handsome and funny, and very likeable. His famous trait is his heavenly voice.

Shim Changmin

Shim Changmin is Lee Dong Wook's favourite Physics student. He's a genius.

Cho Ryeo Woo (fictional)

He is Soo Jin/ Taeyeon's and Si Won's father's doctor.

Choi Hae Jin (Fictional)

Soo Jin/ Taeyeon's and Si Won's sick father who suffers a fatal illness.

Park Mi Yeon (Fictional)

A lovely and successful woman, she's SooJin/Taeyeon's and Si Won's mother. She owns her own restaurant,

Yoo Hyo Rin (Fictional)

Lee Dong Wook's ex girlfriend.