Oh Sehun has been crushing on Do Kyungsoo, his neighbour, for quite some time when he finally decides to anonymously send him a flower, and, to his great surprise, Kyungsoo writes him a poem in return. An impromptu correspondence begins, leading to something more than friendship.

(Harry Potter!au) Slytherin Sehun Oh gets conned by his best friend, a certain Jongin Kim, into signing up for extra Potions lessons, accidentally blows a cauldron and gets himself bound by the hand to Ravenclaw’s Prefect, Kyungsoo Do, aka his long-time crush. Chaos ensues, and feelings, of course.