I’m the Knight Commander of the Second Male Lead

Read manhwa I’m the Knight Commander of the Second Male Lead / 서브 남주네 기사단장입니다
Reborn into the world of a novel, a young woman is sold into the household of a tragic second male lead destined for betrayal and death. Determined to change his fate, she becomes his first ally and rewrites the story with small acts of kindness. But as the plot derails, his guarded heart begins to move in unexpected ways, turning protection into a perilous romance.