After 10 years in the USA, Hu-young returns to Korea and coincidentally meets his first love, Hong-ju, in a café. Just as the window through which Peter Pan flew happened to be Wendy's room. Just as the prince happened to find Cinderella's glass slipper. As if nothing had changed in the last 10 years, Hu-young becomes more awkward only in front of Hong-ju. It's as if he is returning to the age of 19, when he first met his first love, Hong-ju. The days of Hu-young and Hong-ju, which had faded a bit, begin to transform once again into vibrant rainbow colors.