Kouen Ren marries Asta of Ione to further the Kou Empire's plan to unify the world under a single king. He holds no interest in his new bride apart from her country's resources, but Asta, though young and naïve, is determined to make their union work for the sake of her long-suffering citizens. The first half of the story ( Ch 01 - ? ) is pre-canon; KouenOC

They only had each other as kids. He was always hovering around her whenever he felt rage because she was able to bring him back to a calm state. She was His Remedy.

I was a pharmacist, living your basic life here in River Heights, Utah. On the day of my friend's wedding, I heard a strange voice calling out to me. I ignored the voice at first, but then I found a Silver Mirror Long Necklace Pendant on the floor, I touched it, and in a flash of light I get transported to another world. I'm Sapphire Vale, and this is my story.