High Martial World: Grandpa's Invincible Now, School Beauty Granddaughter!

At eighty, Lin Chen was ready to meet his end—until a mysterious leveling system turned his twilight years into a second youth! Every stretch builds muscle, every monster slain extends his life. Now, decades later, this ripped grandpa strolls back into civilization while his seventy-year-old neighbor lies six feet under. His secret? Biceps that could crush steel. Meanwhile, Zhou Qingqiu, the orphaned school beauty from the slums, never imagined her frail grandfather would become humanity's last hope in a world where martial power reigns supreme.