Library

[The end of the world + no heroine + decisive killing + mecha + battleship + pure technology] I traveled through time, lost my body, and became... A robot... This is a world prone to disasters, a world invaded by alien beasts... Here, it is full of darkness, full of killing... Relying on the power of technology, the mechanical army has come to the end of the world. Legendary mechas, battleships, and all kinds of sci-fi weapons appeared out of nowhere, crushing everything... (Started as semi-mechanical, and soon turned into pure robots!)