Kim Miyeon (You / OC) - 17 years old.  Independent and takes care of little sister often because her parents work a lot. Smart and tutors people in need.  Knows how to defend well taught by her older brother. Is adored by everyone in school of her prettiness & friendliness.  Is known as the " Nice Queenka" in Seoul High and loves green tea and bubble tea.

Lee Donghoon- 18 years old. Doesn't like being corrected.  Rich and spoiled and careless. Rejects tons of girls. He loved bullying everyone except his friends until he met you.  Girls stalk him of his handsomeness & guys admire him of his coolness.  Is known as the " Heartless Handsome Kingka" in Seoul High.

Kim Himchan - 18 years old.  Looks mean but actually nice.  Does (fail) aegyo to everyone so they can do stuff for him.  Hilarious, making people laugh all the time. Your older brother who can be dead serious when being overprotective.  Can beat up someone,  Known as " Funny Ulzzang Kingka" in Seoul High.

Shin Dongho - 17 years old.  Goofy and polite.  Adventurous and loud.  Always drags you to random places.  Instead of green tea, he likes bubble tea & banana milk.  Your best friend that is close with your brother also.  Helps you take care of your sister sometimes.  Is the " Baby Face Prince" in Seoul High.

Shin Wonho - 18 years old.  Your ex-boyfriend that you dumped because he cheated on you.  Has known you since kindergarten.  Pops out of nowhere as a new kid in Seoul High.  Claims that he has changed and wants you back.  Hates Donghoon, and vice versa.  You and him have a long history together.