A Month in Étretat

Minerva signs Severus up for a teaching workshop before his fifth year as a professor, and Lockhart tags along for the chance to visit France, under the guise of improving his teaching. But after a few mix-ups, Severus is getting *this* close to hexing Lockhart into oblivion with every day they spend together. Or kissing him. Or - wait, what? (Pre-Hogwarts Era, Post Marauder's Era)