Tensou no Shita no Basilace

is a Japanese light novel series written by Kohei Ito, with illustrations by Yuchi Izumi. The series began publication on October 10, 2004 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
"Towers" and giant creatures that suddenly appeared all over the world. Due to its existence, Japan was divided into east and west across a vast no-man's land. In 2018, 15-year-old Atsushi Kawanakajima, who was in eastern Japan, was selected by the military observation team and aims to become a "tower". However, the corps led by him was wiped out "as originally planned". Only Atsushi escaped to South Hyogo, a remote area in the eastern part of western Japan. Atsushi started working as a member of the disaster prevention team while attending school in the land where the standard of living of the citizens had declined until the 1960s. To play a part in the battle for the resurrection of humanity with his classmates.