Ambassador to a Monster (Sythyry's Journal, #2)

Sythyry was trying to be a reasonably normal enchantment student at Vheshrame Academy, except with a better romantic life. But a tremendously powerful creature named Vae has moved into the area, and the Duke of Vheshrame has appointed Sythyry to keep Vae under control. No chance of that! Vae can't even control herself, or stop herself from helping people in the most devastating ways possible.

Which throws the unprepared Sythyry into a war of magical extravagances, death, starting school clubs, embezzling trowels, retrieving enchanted adventurers, and other dooms.

It's not terribly good for grades or social life, either.