My Sister is the Female God of War — Episode 14

Abandoned by their parents, the Blackwood sisters, Catherine and Grace, grew up with only each other to rely on. As adults, both achieved immense success. However, during Grace's engagement party, Catherine arrives straight from a secret mission, still disguised as a janitor, and instantly becomes the target of ridicule from Grace's future in-laws and high school classmates. When Grace is betrayed and publicly humiliated by her fiancé, Catherine reveals her true identity as the legendary Female God of War, making everyone bitterly regret looking down on them.