Try Love in the mask,love sos,and he's dedicated to roses.all the heroines are strong.
Maybe you'll like http://www.mangago.me/read-manga/crazy_girl_shin_bia/
kaichou wa maid-sama
http://www.mangago.me/read-manga/dengeki_daisy/
It's similar to Kaichou wa maid-sama, but i prefer the MC's here, they're kinda more realistic
Hot Blooded Woman
oresama teacher but the romance didn't start
Any shoujo/josei manga with main girl who is very strong physically, or maybe who wears poker face , or fights? Maybe all of them together. Guy who is (the one the Romance is with) the one "chasing" this / the girl.
Ill be glad for any answers! Thanks~ (๑•ㅂ•)و✧