introduction: This is a story of how the female supporting character slowly becomes the female lead. A melodramatic beginning, a husband and his sister-in-law spark true love after years of marriage, asking his wife to step aside for their sake. A strange process unfolds, the sister-in-law is moved by the true love between her husband and his sister and decides to give way, but then the husband suddenly gets into an accident and becomes paralyzed from head to toe, while the sister-in-law goes crazy...