Nearly 50 Years Old?! He Gets LIFE-EXTENDING SYSTEM and Starts His Rise From Poor Village

MC wakes up nearly 50 years old in a dirt-poor village, with a weak body, empty food storage, and barely enough time left to enjoy another life. Everyone sees him as an old man whose best years are already gone. Then the Life-Extending System appears. Every dangerous hunt, achievement, and completed mission can add precious years back to his lifespan while strengthening his body. MC starts with simple hunting and farming, but soon he is bringing home more food than entire families, earning silver, improving his house, and slowly becoming younger and stronger. The villagers think the old man suddenly got lucky. They have no idea he is literally earning his youth back one victory at a time.