Assault Colossus Of The Nemesis Warfront (lightnovelstranslations.com)

Suddenly, Mozuya Kou finds himself sent to the wartorn Nemesis system; on an alien planet, Asia, in the far future. In this bleak future where deadly autonomous weapons called Murders roamed, he ends up finding the abandoned mass-production machine [TSW-R1 Lanius]. He then pilots it to defeat his enemies only through…