Yasei no Last Boss ga Arawareta!

Ruphas Mafahl – the black-winged overlord and once the leader of the Twelve Stars of Heaven. She was defeated by the legendary seven heroes about two hundred years ago. After that, her story gets closed.  

But one day, a random man from the real world suddenly awakened in her body. The world of Exgate, which he once knew as the only game, has changed to his reality. With no limits and human rules, he is free in the world of Exgate. Now, he revived in the form of Ruphas, he sets out to wander the unfamiliar land and search for the Twelve Stars of Heaven. He went on his search all alone without any army or allies.  

One of the mysterious looms above all others is that Why was an ordinary man was chosen to be the Ruphas Mafahl?