Prickly Gold Finger

The end of the world is coming, and the bone-eroding virus sweeps across the city overnight, and the infected people come back from the dead. Lin Shen, a nurse in the emergency department, is bound to an "equivalent exchange system" in the sealed off hospital--killing infected bodies to obtain the essence, which can be exchanged for strength, skills, and materials. But for every transaction, there is a second price to pay besides the essence: a memory, a sense, and an emotion. [Strength enhancement: 10 source of quality, plus a memory] [Ask for price details: 10 source qualities] [Opportunity of resurrection: the life of the person you cherish most] In this system, even "knowing what you will lose" costs money. And when the system prompted "Other hosts detected, hunt or be hunted", Lin Shen realized: the end of the world is not a natural disaster, but a screening. Exchange everything, or keep yourself? He led a broken team through the dead city, step by step towards the truth behind the system - and towards everything that was taken away and belonged to him. (Calm-down male protagonist + military doctor female protagonist, cost-effective system, no virginity, no abuse of the protagonist, happy ending.)