Magatsuhime no Hatsukoi: Touda-koku Koukyuu Ibun

Chunrin, the eighth princess of the Eikoku Kingdom, whose heart has been cold due to her childhood trauma. She is decided to enter a neighboring country where the conflict continues. Chun-rin showed no interest in marriage and followed orders, but the world changed completely when she witnessed King Onitake cutting off the traitors who broke into the ceremony with a single sword. The blood-splattered bride said. "I like you, please marry me." A Chinese mystery-solving story of an eccentric couple that begins with an unprecedented confession.

Source: MU