Jongin is playing with a stick when something irritates his eye, unexpectedly a boy by the name of Sehun comes to rescue the day. Jongin and Sehun become friends and Sehun inquires what exactly love is, leaving Jongin lost for a proper answer. When Jongin leaves they both fear they might not see each other again, but when Sehun and Kai meet twenty years later something immediately clicks between the two. Despite their unforgettable day on the playground neither of them recognizes the other. Will they come to realize who they are and will they ever end up admitting their feelings and get together?