Please consider: a Bagginshield Sound of Music AU
Bilbo is a young, slightly subversive teacher in 1930s Austria.
Gandalf, an old family friend, sets him up with a slightly less…public post as tutor to the nephews of a retired army captain.
Captain Thorin Durin is sent a new governess for his legion of orphaned nephews (what kind of name is ‘Bilbo’ anyway?) only to find out said governess is in fact a man.
Bilbo finds himself in charge of ELEVEN children (somehow Gandalf neglected to mention the number). Butler and general keeps-everything-from-going-tits-up person, Balin, jokingly refers to as 'the Company’.
A ridiculous contract ('INCINERATION?’ 'There was an…incident with a previous governess.’) and several pranks later (a tarantula in his bed - where did they even get a tarantula?) and Bilbo settles in with the children.
Of course he constantly buts heads with Thorin over the children’s teaching. Seriously this man is so STUBBORN.
Thorin is just frustrated and a little baffled by this argumentative little man who comes in and takes over his house. After one particularly bad argument, he nearly fires him. Then, then he sees the way he has with all the children, the rapport he has built with each of them, and he relents.
Gradually, they grow to tolerate one another and definitely do not fall in love (kidding, these idiots are head over heels for each other).
Both come to this realisation dancing together at a ball (oh goodness, that dance scene).
After a minor understanding involving a rumoured engagement between Thorin and a rich duchess (in which Bilbo leaves, but at the behest of the children comes back) and leaving Austria after the Anschluss, they all live happily ever after.