Part 1 of Episode 1: My sister and I awakened our respective systems at the exact same time. One was the 'Clear System,' capable of erasing anything at the cost of physical stamina; the other was the 'Ho System,' which provided a storage dimension. Worried about my fragile sister, I chose the Clear System despite its taxing nature, while she took the Ho System. Little did we know that the apocalypse would arrive exactly one week later. Amidst the terrifying cold and waves of zombies, I used my Clear System to fight like a madman, eventually becoming the city's hero. Meanwhile, my sister was relegated to the role of a mere warehouse manager. During a zombie siege, as I lay badly injured and desperate for supplies, I saw that my sister had locked the safe house from the inside. She looked at me coldly and said, 'Why should you be the hero while I'm just a warehouse manager?' When I opened my eyes again, I realized my sister had snatched the Clear System. She had been reborn too. I laughed because she had no idea of the true toll of the Clear System. It drains immense stamina; even a man of my build felt weakened for days after using it. A delicate girl like her, who can't even open a water bottle, probably won't be able to get out of bed for three days after a single use.