I Guess I Became the Mother of the Great Demon King's 10 Children in Another World, Volume 7 (I Guess I Became the Mother of the Great Demon King's 10 Children in Another World #25-28)

I'm a 16-year-old virgin who's never had a boyfriend...Yet I'm going to be the mother of a Demon King's children...?! I guess I became the Mother of the Great Demon King's 10 Children in Another World is a romantic comedy about raising a child in another world by Ema Toyama, the author of Missions of Love! Akari, a high school girl, lost her mother, who was the only family she had, in a freak accident. Wishing for a family, she is summoned to the Zodia Empire, a foreign world that is home to demons. There, she is told that she will bear the children of the Archfiend, King Gran, so they can fight in their war against Soleil, the land of humans! She is a virgin, but thanks to cheat items, she gives birth to six children!

Gran is captured by Ciel, the Queen of the Celestials, while Akari, who returned to her own world, goes looking for Shinichiro, the human husband of her mother-in-law Dernière, with her children. They find Shinichiro, but he has lost his memories of the other world. However, he is determined to go back to Zodia with Akari and her children. Gran is mortally wounded by Ciel, but thanks to the skill of Six, the sixth child, and the entire demon clan taking care of Gran's wounds, the surgery is a success and Gran is saved. For the first time in a long time, peaceful days have returned. But not for long...