What happen your mother tells you that she is married with your one and only enemy's father and your enemy becomes your stepbrother? When you all ahve to moved in together, Lets the battle begin......

Kwon Yuri

A very innocent y type.

Kai's number 1 enemy

She is actually Kai's childhood bestfriend but becomes enemy when Kai starts to date Yuri's childhood enemy.

Kai's stepsister.

Kai's target at school.

Smart , Straight A student

Kim Jongin aka Kai

y sometimes shy and cute

Yuri's number 1 enemy

Yuri's childhood bestfriend  but becomes her enemy when he started dating Yuri's number one childhood enemy.

School's number one playboy

Yuri's stepbrother

Always tease Yuri at school.

Never cared about study in class but always pass the exam with good scores.

Poster Credit to Experimental Graphic Design; xoxo™