Disaster Strikes: I Win by Lying Low with an Overpowered Healing System

[There is a romantic pairing, but this is no sweet romance. The heroine is a powerhouse, not a saint, but she has principles. The story leans toward thrilling action.] Disaster strikes, and she has no money, no hoarding space, no ability that boosts her survival skills, and she isn’t even a doctor! All she has is a pretty useless HP-restoration System. It needs to level up, and it even has a cooldown. What can she do? Ye An says, “If all else fails, I’ll just bang my head against a block of tofu.” Fortunately, she has a chuunibyou younger brother who practices martial arts and loves reading post-apocalyptic novels. When he learns the truth, he doesn’t think his sister is crazy. Instead, he says, “Disaster’s here. Protect our Cai Wenji!” Ye An: “...” After disaster strikes, one catastrophe after another follows. The power, internet, and water are cut off, no rescue or supplies arrive, and people grow restless. The Ye siblings hold fast to their last principles, taking up weapons to protect their Sunshine Residential Community! But unexpectedly, Ye An isn’t the only one with an HP-restoration System. Some people have hoarding spaces, while others have portable operating rooms. Now things are complicated. No... now things are getting fun.