
2002

1968

1966

2016

1994

1985

2014

2015

2014

2025

1997

1979

2011

2014

2014

1991

2008

2008

2011

2013



In a post-war alternative timeline, Japan is divided into the North, controlled by the Union, and the South, controlled by the United States. A mysterious high tower rises within the borders of the Union. Three high school students promise to cross the border with a self-built airplane and unravel the secret of the tower.