In this Game you control the young red headed boy known as Adel. The story begins with a demon Xenon, The King of Demons who has cursed Adel's hometown where the people are now losing their memories and are changing into demons themselves. As a tragic event from his Mother begins, Xenon's Daughter Rosari has appeared to the world and is quite annoyed at the situation making Adel promise that he'll help her get back home to her Father Xenon. Though on their journey to her Home, Adel has much more on his mind than taking her back to her Father.
This game is also known as Makai Senki Disgaea 2 in Japan.