 If you liked
Haikara-san ga Tooru
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 ...then you might like
Honoo no Alpenrose: Judy & Randy
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These are romances with a female protagonists taking place between the ends of world war 1 and world war 2. One series takes place in Japan mainly, the other in Europe.
Haikara san focuses more on comedy, the weaknesses of the protagonist and her development in life and love, while Alpenrose is more about the adventures of the protagonist while chasing her love against external obstacles.
However, if you like a romance story in a historical setting, with a protagonist who becomes more and more daring in the pursuit of her goals, both titles may be for you.