Responses
some black flags:
https://www.mangago.me/read-manga/obscene_lnvasion/ price of obsession short story
https://www.mangago.me/read-manga/die_in_my_arms_kaizen_scan/ both of them are crazy
https://www.mangago.me/read-manga/passion_1/
not black flag but definitely obsessive : https://www.mangago.me/read-manga/cloud_1/
do you know any (long) bl with black flag, like obsessive psycho top/bottom or something like that ?