Characters.

  Lee Do Hee -- Park Ki Min -- Kim Ji Ae

Introduction of Park Ki Min

Nothing interesting . Have a long straight hair . Wear glasses but not a nerd . Known as the daughter of the owner of a prestigious high school which is Park Ki Soo. Don’t have a mother since her mother passed away when she's still young. A junior but entered as a senior thanks to her smart brain. Her only friends in the school is her female cousins. The youngest / maknae among her eonnies but the most mature .

Introduction of Lee Do Hee

One of Park Ki Min female cousins and only friends besides Kim Ji Ae in SMEHigh . Also have long straight hair like her dongsaeng does. She only trust her two lovely saengs. Also a smart-. A real senior. The oldest among the three but very childish. Very protective toward the youngest.

Introduction of Kim Ji Ae

Kim Ji Ae is the other cousins and only friends of Park Ki Min besides Lee Do Hee. Have long straight hair like the other but sometimes wavy. The smallest among the three although she is the second oldest. She also skipped her junior year because of her smartness. Very protective toward the youngest. Share the same class with the other two. She's the playful one.

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Kris Wu -- Luhan -- Oh Sehun -- Kim Jong In -- Zhang Yi Xing

Kris Wu

Kris Wu. People called him Kris. One of the transferred students. Transferred together with his other cousins. He's the second oldest. One year younger than Luhan. Ki Min's cousin. Have a very cold-personality. However, like other people said, 'Don't judge the book by it's cover'. Have the same age as Do Hee. The mature one.

Kim Jong In

Kim Jong In as known as Kai. One of the transferred students.The second youngest. The childish one but sometimes can be very serious. Ki Min's cousin. Has the same age with Ki Min. Enter the school as a senior since he's very smart. The playful one.

Zhang Yi Xing

Zhang Yi Xing also known as Lay . Even though his nickname remind you of some kind of chips brand before , but , not anymore. Now , you'll remember Lay as Zhang Yi Xing not a chips brand * -.-'' DUHH ! * He's one of the transferred students . The third oldest. Ki Min's cousin . Enrolled the high school as a real senior. Share the same age with Kris. The nerd a.k.a smart one.

Luhan

Xi Luhan is also one of the transferred student. His nickname is Luhan. Judging from his look , he look like the youngest right ? However, you're wrong. He's the oldest. Enter the school as a senior. Ki Min's cousin. The baby-faced one.

Oh Sehun

Oh Sehun. Known as Sehun. The youngest among the cousins. Do a lot of aegyo to his hyung. One of the transferred student. Ki Min's cousin. A junior but enrolled as a senior. * you should know the reason though >.< * Share the same age with Ki Min. The cute maknae.