Jung Yonghwa

A caring and understanding father. A famous composer and music director. Playful, likes to tease his wife. Over protective towards his wife and child. Likes to say cheesy line and watch his wife work in the kitchen. Loves to play music.

Jung Seohyun/ Seo Joohyun

A graceful, kind, courages mother. Very neat. Smart, strict, honest, beautiful, healthy, and hygiene. Teaches music in SM High. Best friend with Park Taeyeon. Loves to play music, especially piano and violin.

Jung Stephanie/ Tiffany

Yonghwa and Seohyun oldest daughter. 21 years old. Attends Seoul University, majoring in model and act. Best friend with Lee Sooyoung. Had a crush with her sunbae, Shim Jaejoong. Sweet, calm, neat, honest, and smart. Thinks her eye smile is attractive. Loves her bestfriend younger sister, Amber and her crush younger sister, Sulli and her friend boyfriends younger sister, Krystal, since she doesn't have any younger sister, which she really wanted one. Loves her younger brother.

Jung Minhyuk

Yonghwa and Seohyun youngest son. 17 years old. Attends SM High. Calm, spoil, shy, fashionista, coward, always obey his sister. Likes to do aegyo. Had a fling on his hoobae at SM Middle school, Luna.