Saigo no Natsu ni Miageta Sora wa

is a Japanese light novel series written by Yu Sumimoto, with illustrations by Bonta Ooki. The series began publication on December 10, 2004 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Weapons that were supposed to be put into the war that once happened- "Gene-enhanced soldiers". The price of gaining unwanted power through unreasonable gene fortification was destined to die in the summer of 17 years old. Now that it's peaceful-16 years old, the penultimate summer. Junko Kotani, a strengthened soldier girl who lost all her memories, passed through the gate of the high school she was transferred to. However, the high school is surrounded by a terrible fence, barbed wire, and guards with guns ... One year left until the last day. They are waiting for that time. Like struggling or giving up.