Tenken Oki Dual Lord, Reversion

is a Japanese light novel series written by Choshiro Miwa, with illustrations by RAMI. The series began publication on July 10, 2001 by ASCII Media Works under their Dengeki Bunko publishing imprint.

The series won an Honorable Mention in the 7th Dengeki Novel Prize.

Synopsis
The boy, who was pulled by his grandfather and got off the dolly, first saw the red soil mixed with sand, the wilderness with endless short grasslands, and a shabby station that looked like a storeroom. And he was a girl ... The boy's name is "Wakaba" and the girl's name is "Ayumi". The two begin to live with their grandfathers, and Tsou and Fanaga, who have settled in without knowing their true identity. Wakaba and Ayumi, who turned 15 years old, decided to go to the royal capital to take the selection test of , which is the highest institution of the nation as a duty of the royal capital. It will change even-- !? A new type novel that lets you read with a unique taste and attractive characters.