In a world where only two types of species exist, Taehee is human while Sehun is perfect and they aren't supposed to know of each other's existence at all.
You know, that old « new neighbour » cliché ? The one where a hot guy/girl moves in the house next door or on the same street ? The one where the hot guy/girl talks to the antisocial/nerdy/weird/rejected/alone person and then… well, you know. I don’t need to explain what happens next. If you don’t know, well… you’ll see.