Your Majesty, I Must Decline the Role of Queen!

"I am the only one allowed to leave you with scars." Waking up in a Chinese-inspired alternate world?! One day, Miyuki suddenly finds herself reincarnated as the beloved heroine of a novel she adored in life. As Shinsetsu, she marries Rensei, a king from a foreign land, but she is immediately told that an heir is needed, leaving her no time to settle in! The king's love grows stronger day by day, and with sweet, straightforward words, he melts her heart. At the same time, her innocent body slowly takes on a more alluring hue... Source: BisouBisou Comics