Gunjin Koushaku wa Migawari Hanayome wo Dekiai suru

Overview

"Please, Your Majesty, feel it as much as you can." His lips, his tongue, are tracing my body... What on earth is this feeling? "Any man would do for you. You live up to the rumors, you slutty queen." Oswalt, a knight and the second son of a duke, is in love with a townsgirl named Effa. However, one day she's kidnapped by assassins from an enemy country and ordered to act as the queen's body double! Four years later, Oswalt is now a war hero, and Effa has been ordered to marry him in the place of the queen of the losing country. Her dream to reunite with him had finally come true, but he believes that she's the real queen. "Where is the woman I love? I'll sleep with you as much as you'd like if you tell me." Effa realized that if people discovered that the woman he married was a fake, then his name would be sullied. However, her body can't withstand his calm yet passionate touches...

Source: AniList