How Can I, Reincarnated as a Demon King, Be a Dragon Lady?

[System Change Marriage Female Imp Pure Love] Mu Yan died suddenly due to overwork and was reincarnated into this different world. The good news is that he obtained the system and became the demon king Rias who dominates the world. The bad news is that he was born in a brave family and was imprisoned at the beginning. "You stinky brave warrior, let me out!" "It's not up to you." After saying that, the brave Lyle blocked Rias' mouth. "!?"