Caesar Leat starts as F-rank trash in a world dominated by Mecha Girls. The Upgrade System awakens and changes everything. He transforms a dying Mecha Girl into his first SSS-rank masterpiece using scrap and grit. Caesar climbs the ranks through constant upgrades. The dark elite Mechanicus believes they are untouchable. They have not met the man who turns scrap into legends. His Mecha Girls are willing to burn the world for him.
