When Shin Soo Ok and Park Chan Yeol were children, they were best friends and "childhood sweethearts". They spent every single day after elementary school together, playing on the playground or in their back yards. But like almost every childhood friendship, they lost each other.    After ten years of not hearing a single thing from each other they meet again. But what if, everything is different, and the person you used to love as a child is not the same anymore?     All righ