It's the story about a boy name Yoo Jeongyeon who get kicked twice a year because of his bad attitude and his parents always spoil him so it's okay to them to transfer to every good school in Seuol but only one School is left to be transfer so his mom make a move and tell him that if he get kicked out  in Maple Leafs University they will send him to the Dormitory of PUNISHMENT which is own by his grandmother, but when he got there he met Four outstanding girls who receive many respects from the other students they said they can handle every problem inside the school and YEP Jeongyeon is the new problem of the four girls name Nayeon,Sana,Mina and Momo. Can they change Jeongyeon to a better person? or Jeongyeon will change them from elegant into a barbaric one?