I tried to check out your already read but I dont think its a good reflection on what youve read...So here are the popular ones that im sure youve read but idk
> http://www.mangago.zone/read-manga/honto_yajuu/
> http://www.mangago.zone/read-manga/saezuru_tori_wa_habatakanai/
> http://www.mangago.zone/read-manga/nights/
And here are some others that I personally enjoyed
> http://www.mangago.zone/read-manga/doutei_hitsuji_to_abazure_ookami/
> http://www.mangago.zone/read-manga/koi_made_hyakurin/
> http://www.mangago.zone/read-manga/koi_no_amai_toko/
> http://www.mangago.zone/read-manga/boku_no_shiru_anata_no_hanashi/ (I love this one a lot)
> http://www.mangago.zone/read-manga/ibitsu_na_koi_no_seesaw_game/
> http://www.mangago.zone/read-manga/on_doorstep/
> http://www.mangago.zone/read-manga/houkago_no_love_call/
If you're interested in more that could be hit or miss, theres always
http://www.mangago.zone/tag/yakuza/
http://www.mangago.zone/tag/criminal/
Happy reading!
any good bl manga involving yakuza or criminals?