For many years, the Republic of San Magnolia has been at war with the neighboring Giadian Empire. Faced with the relentless might of the Empire’s Legion of autonomous drones, the Republic counters with unmanned weapons of their own, creating a battlefield that is supposedly without casualties. However, beyond the fortified walls protecting the eighty-five Republic territories lies the “nonexistent” Eighty-Sixth Sector. The young men and women of this forsaken land are branded the Eighty-Six and, stripped of their humanity, pilot the “unmanned” weapons into battle...

Lena takes command of the Spearhead squadron from her post within San Magnolia’s fortified First Sector. She and Shin fight on without ever seeing each other, buther attempts to forge a bond of trust are stymied by the walls of hatred between Alba and Colorata, as well as the literal fortified walls between the Republic’s eighty-five Sectors and the front lines. With tempers flaring after a death on the battlefield, Lena is forced to confront her own ugly cowardice and will soon come to learn why Shin’s previous handlers called him Reaper.

シリーズ累計130万部突破!! 最重要防御拠点を担うスピアヘッド戦隊の隊長シン。その部隊を指揮するレーナ。隊員カイエの戦死によって、レーナは有色種のエイティシックスが自身のような白系種に抱く真の感情を知り己の無知さを痛感した。そして、レギオンの再来時、彼らの呻き声の中に微かに聞こえたのは戦死したはずのカイエの声だった――。