Did you read You're my Loveprize in Viewfinder? http://www.mangago.me/read-manga/you_re_my_loveprize_in_viewfinder/
This one is really good
http://www.mangago.me/read-manga/totally_captivated/
http://www.mangago.me/read-manga/saezuru_tori_wa_habatakanai/
there's still a mafia though
http://www.mangago.me/read-manga/akuma_de_keiyaku/
http://www.mangago.me/read-manga/akunin_o_nakaseru_houhou/
http://www.mangago.me/read-manga/kaitou_game/
http://www.mangago.me/read-manga/uchi_no_ko_ni_narinasai/
http://www.mangago.me/read-manga/royal_fiance/
http://www.mangago.me/read-manga/dou_imo_nara_nai/
http://www.mangago.me/read-manga/senya_ichiya_romanesque/
http://www.mangago.me/read-manga/amai_jouken/
http://www.mangago.me/read-manga/taiyou_no_kikoushi/
http://www.mangago.me/read-manga/kiraboshi_dial/
http://www.mangago.me/read-manga/houkago_no_love_call
http://www.mangago.me/read-manga/kuchizuke_wa_uso_no_aji//
http://www.mangago.me/read-manga/dear_my_mister/
These are very good ones. When you're done tell me how you like them
Okane ga nai
Can anyone recommend a YAOI manga with a plot where the seme is a possessive yakuza/mafia....or with a super rich seme very supportive on the uke..??thanks much...