Oni ni Meawase

---I have been longing for you for a long time. By the grace of an oracle, Shiran, a child of the gods, is married to Ura, the lord of the castle who is feared as a "demon". Many people are afraid of the big man who came from the continent, but Shiran has had feelings for the rugged Ura since he was a child. Determined to be a man, Shiran undergoes a secret technique that enables him to able to conceive, and he presses Ura to become his husband.... The story is about a marriage between two different age groups, where they gradually develop feelings for each other while being unable to hold back their burning bodies.