Most of them are josei sorry huhu
http://www.mangago.me/read-manga/wild_ones/
http://www.mangago.me/read-manga/tokyo_crazy_paradise/
http://www.mangago.me/read-manga/yamaguchi_kun_wa_warukunai/ (not exactly strong fl but still yakuza shoujo)
http://www.mangago.me/read-manga/tendou_ke_monogatari/ (not rlly yakuza but still good)
http://www.mangago.me/read-manga/raise_wa_tanin_ga_ii/
http://www.mangago.me/read-manga/gokusen/
http://www.mangago.me/read-manga/koi_to_dangan/
http://www.mangago.me/read-manga/koroshi_ai/
Gokusen was good but it’s pretty slow on romance (if that’s what you’re looking for) raise wa tanin ga ii is SUPER good, but the ml is the possessive one (Fl is really interesting tho and doesn’t take his bs sitting down!!)
y'all know any good shoujo yakuza manga with a strong female lead? preferably possessive