Musical Comedy Time S01 E03 The Chocolate Soldier

When Lieutenant Bumerli, a Swiss mercenary in the Serbian army, takes refuge from his Bulgarian enemies in the house of a Bulgarian general - to be precise, in the daughter's bedroom - he sets hearts a-flutter, almost compromises three ladies and then ruins the daughter's wedding to a Bulgarian soldier-hero by being recognised as the fugitive! This is just as well because he and Nadina, the daughter, were destined for each other anyway.