from I Am the Hero, and the Demon King Is Also Me
She is the mother of Yuuma. She was the Demon Lord in another world and married his father who was the Hero brought to kill her. They faked her death and left together to live their romance. His father claims that at that time he had fallen for her breasts.
I Am the Hero, and the Demon King Is Also Me
Combines the legend of a demon king with a hero who crosses over time and other things. Involves traveling between a Japanese living room and another world.
