Xuji

https://www.mangago.zone/read-manga/anata_wa_korosu_tabi/

Dangerous Convenience Store. Don't Mess with the Puppy. I have several lists with yakuza BL

These are some that seme is involved with yakuza/mafia/crime syndicates,:

https://www.mangago.zone/read-manga/golden_opportunity/

https://www.mangago.zone/read-manga/bakana_inuhodo_itooshii/

https://www.mangago.zone/read-manga/nights_before_night/

https://www.mangago.zone/read-manga/when_the_yakuza_falls_inlove/

https://www.mangago.zone/read-manga/because_love_exists/

https://www.mangago.zone/read-manga/yonin_no_nibiiro/

https://www.mangago.zone/read-manga/tasuketa_yakuza_ni_nerawaretemasu/

https://www.mangago.zone/read-manga/viper/

https://www.mangago.zone/read-manga/omerta_1/ - Mafia

https://www.mangago.zone/read-manga/eye_of_the_storm/ - crime syndicates

https://www.mangago.zone/read-manga/a_thousand_cranes/
https://www.mangago.zone/read-manga/tosca_no_inu/
https://www.mangago.zone/read-manga/rouge_katsura_komachi/
https://www.mangago.zone/read-manga/lion_and_venus/
https://www.mangago.zone/read-manga/kozure_omega_to_boukun_yakuza/
https://www.mangago.zone/read-manga/touch_up_jujucat/
https://www.mangago.zone/read-manga/saezuru_tori_wa_habatakanai/
https://www.mangago.zone/read-manga/mad_dog/

https://www.mangago.zone/read-manga/max_mojave_s_case/
https://www.mangago.zone/read-manga/madman_combo/
https://www.mangago.zone/read-manga/mayday_mayday_mayday/
https://www.mangago.zone/read-manga/when_the_yakuza_falls_inlove/
https://www.mangago.zone/read-manga/i_declare_vengeance/
https://www.mangago.zone/read-manga/a_thousand_cranes/
https://www.mangago.zone/read-manga/monetary_love/
https://www.mangago.zone/read-manga/kozure_omega_to_boukun_yakuza/
https://www.mangago.zone/read-manga/the_black_beast_and_the_night_flower/
https://www.mangago.zone/read-manga/the_omega_takes_a_husband/
https://www.mangago.zone/read-manga/naked_sword_and_tree_peony_of_black/
https://www.mangago.zone/read-manga/the_time_a_gangster_was_reincarnated_as_ranmaru_mori/
https://www.mangago.zone/read-manga/majo_to_neko/
https://www.mangago.zone/read-manga/la_vie_en_rose_katsura_komachi/

Have you read any of these? (≧∀≦)