16 years old : goo hye reum ,  Park minjae , Oh sehun

 18 years old : Park chanyeol , Doo kyungsoo , Amber , Joy , Jackson Wang

Goo hye reum is a bright girl , she can’t stand seeing someone needing help without helping , she’s so stubborn , beautiful and smart but when she is angry she messes up sometimes, talented a good singer and an amazing dancer , she hates exploiters and bullies .

Oh sehun is a transferred student because he just moved from busan to seoul , he became someone dull since he moved cuz he loved his life and friends in busan but his family had to move out because they needed to leave the house since they can’t afford the monthly payment anymore since sehun’s father left them to go work abroad and didn't send them any money since then , he is handsome , so smart and an awesome dancer but shy , when he is comfortable he becomes crazy but funny and cute

Park Chanyeol he is rimmie’s neighbor since they were 5 years old they are not so close but they are good friends , he is a very friendly guy who can rap like a monster but still looks cute , he is tall ,handsome and smart he cares alot  for his sister park minjae and his best friend doo kyungsoo , he is good with a piano and good with technology

Park minjae is chanyeol’s little sister she is pure , pretty , funny , loyal sometimes childish she hates anyone who makes her best friend (rimmie) or her oppa sad , minjae and rimmie were bestfriend since they were 5 years old