I Absorb All Abilities Alone

'''Introduction to the Work: A 50-kilometer-tall tree, six times the height of Mount Everest, grew on the Korean Peninsula. People called it the World Tree. People began to climb the World Tree and discovered mysterious treasures within it. A fruit that could cure any disease. A fruit that granted mysterious yet immense abilities. Rumors spread that a golden fruit existed at the summit of the World Tree. A man who climbed the World Tree to cure his younger sister's incurable illness. He needs the fruit of the World Tree.'''