Everyone's Lord: DIY Master of Mecha

In a dystopian era, Adrian Geare awakens as an SSS-level mechanoid, becoming a prime target. When school bullies invade his territory, he finds himself in dire straits. Awakening the "Mechanical Heart System", he crafts transformative mechs by hand, swiftly vanquishing formidable foes. Battling through ultimate trials, he crushes the Transcendent Lord families. Leading a mecha army, he dethrones reigning powers, ascends as the ultimate leader, and unleashes a world-shaking mechanical revolution!