Earth Sphere Chronicle: Dai Tenshi Fio

is the second volume of the Earth Sphere Chronicle light novel series, written by Shota Asuka and Illustrated by Aya Kadoi. It was released under the Dengeki Bunko Imprint in May 2001.

Synopsis
Alice, who defeated the Demon King at the end and saved the world, is sentenced to 800 million years in prison for countless crimes committed in the process. When she ran away saying "I can't do it !!", she was proposed by Prince Leon, who has good looks, a clear mind, a versatile sport, and a gentle personality. However, the maiden's heart swayed by her throbbing development was ignored, and the world was still in danger ... Ark and Alice collide over Fio, a girl with a singing voice that calls an angel! The Demon King Corps, which has no rules, is back in the world on the brink! This is the second high-tension fantasy of rumors.

(source: Amazon JP - Translated)