This one is not my story! The Lip-Lock Jinx, a jinx that renders the victim mute that can only be undone in two ways: if the caster reverses the spell on the victim, or if the victim serves the purpose of the jinx and kisses the person that they desire. It's just Harry's luck that he gets jinxed by Ginny Weasley and that he's in love with Draco Malfoy.

Harry Potter quit his job as an auror to become a professor at Hogwarts after he heard about madam hooch retiring. On his first day he ran into the new head of Slytherin Draco Malfoy and something inside him stirs.