Responses
http://www.mangago.zone/read-manga/thirsty_thirty/ (office romance but I dont really remember If the female lead is strong... I think she was but I dont want to give you false info)
http://www.mangago.zone/read-manga/the_lady_and_her_butler/?r41i (really independent and strong character)
http://www.mangago.zone/read-manga/woman_s_best_friend/ (she had some low self-esteem but I think she got really strong after meeting the male lead)
I enjoy reading all three of them I hope you'll like them too
Guys can you recommend me any office romance where the female lead is strong? or independent?