The Day the Detector Reported an Error, I Became the Strongest Human Being

On the awakening day, the whole school saw that I had an F grade. My childhood sweetheart called me a waste. That night, the national director knelt in front of me and said, "You are SSS+." She led me in training and shielded me from the knife. The superpower nuclear disintegrated, leaving me with only one life left. I lost ten years of my life to save her life, and her hair turned completely white. In the global competition, the five-star red flag is raised for me. She cried in the audience. I have won the world, and I just want to ask her: Do you mind the gray hair?