After Marrying Her Arch-Rival, the Northeastern Prince, She Discovered That He Was in Pure Love.

My mortal enemy suddenly wanted to enter into a business marriage with me. I'm tired of hearing his Northeast dialect! So I lurked beside him openly and acted as his secretary, trying to find out his true purpose. Until the end I couldn't help but ask him why he married me. Rival: "You der, what else can I support by marrying you? I just care about you."