Responses
I think what you are looking for is The Man At Night
here: https://www.mangago.zone/read-manga/the_man_at_night/
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So there is this bl manwha that i read and it was really good but i forgot the name so pls let me know if u know it(๑•ㅂ•)و✧;so it starts off with a guy stuggling to pay rent and his younger bro and then the older bro finds out younger bro can afford the rent so he follows him to a strip club and he sees that younger bro is a stripper so he starts beating him up cuz he saw him bleeding(btw the older bro becomes aggressive when he sees blood)and the other performers struggle to stop the fightbut then the lesbian manager stops it and by the time she stopped the fight it was younger bros turn to perform but he cant cuz his face is all beaten up so then a performer(the male lead whis code name is gold something) suggests that older bro should perform to pay back the loss (the club lost abt 100,000,000won) so they push him onto the stage and its revealed that he has a yakuza tatto (and his codename was tatto oppa or tatto hyung or crimson red watever) btw this is just the summary of the 1st 2 chapters and i think there are abt 70-80 chapters (last time i checked) oh and btw its in black and white(≧∀≦)