Genius Mechanic

Ying Chenlin was reborn and returned to his genetically mutated 18-year-old self. During that year, he had just won the first grand slam of the Mecha Alliance, following his heart and pursuing his dreams. However, two years later, he suffered from genetic backlash, leaving him disabled in half of his body, confined to a wheelchair. In his most difficult years, it was KID’s boss who took him in, giving him a chance, teaching him a new profession, and pulling him out of the abyss. Starting anew, he turned down offers from various bases, resolutely retired before his body deteriorated further, and applied to become a mecha mechanic at the KID base. Repaying the debt, recovering his health, starting over again—even if he was full of scars, he was determined to reach the summit once more. Source: NU Includes 25 extra chapters.