Lady and her butler!! The MC is still very much naive in love, but she's still the strong type despite that. All conflicts are handled maturely! Well, at least, it makes you laugh at other manga cuz they can sometimes drag 10 chapters out of a misunderstanding lmao This one maybe just 2 or 3 chapters tops.
http://www.mangago.me/read-manga/ojou_sama_ga_mamorasete_kurenai/
http://www.mangago.me/read-manga/reminiscence_adonis/
http://www.mangago.me/read-manga/called_game/
http://www.mangago.me/read-manga/joou_no_hana/
http://www.mangago.me/read-manga/chouka_kou/ (well she hasn't really fallen in love but still)
http://www.mangago.me/read-manga/anatolia_story/ (it's a looong way of development)
http://www.mangago.me/read-manga/empress_of_another_world/?av=1
Any manga where the female lead is strong and falls in love but still remains strong and not those naive stupid girl in love??