You Take Your Childhood Sweetheart as Your Second Wife, So I'll Marry a Prince and Become Empress

After five years away on campaign, he returns victorious, only to use his military merits to take a mistress as a secondary wife. For five years, she had dutifully cared for her mother-in-law, strictly guided her younger siblings, and worked tirelessly to manage the household, all while waiting for his return. Now it all feels like a joke. Unwilling to waste her life, she resolutely divorces him and walks out of that sprawling estate. Only then does she discover how deep blue the sky beyond is, and that the right person for her has already quietly entered her life…