Corner Seong Jipsaro Saranamgi

After her treacherous cousin steals her title and fortune, then tries to sell her into marriage, Brienne cuts her hair and disguises herself as a boy to escape. She finds refuge at the Connett Estate—located in a domain that acts as a self-governed city immune to imperial law—working as an assistant butler to the formidable Duke Ulrich Connett. Though feared across the empire as a ruthless war monster, Brienne discovers a surprisingly warm heart underneath his cold exterior—while Ulrich finds himself captivated by his brilliant, fiercely capable new aide. (Source: WEBTOON)