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Replying so that I get notified when someone answers </3
maybe this?? similar but not completely sure
https://www.mangago.me/read-manga/akuheki/
A BL about two office workers one is a relatively good guy but he actually has an inferiority complex and likes hurting people and the other is a masochist who likes egging him on. The masochist was kidnapped as a child. It starts really dark but ends surprisingly sweet.