Looking for this
The male lead (ML) is a knight and holds the title of duke.He is married to the female lead (FL), but he treats her coldly.His fellow knights disapprove of the FL and prefer a short-haired female knight, whom they believe is a better match for the ML.There's a scene where the FL looks out of a window and sees the ML walking with the short-haired female knight, who then glares at the FL.In another scene, some of the ML's fellow knights approach the FL, express their disdain, and suggest she divorce the ML
What flag is our ML?