I Use the Apocalypse Sign-In System to Build a Harem

Gray fog descended, and zombies ran rampant. Ninety percent of humanity turned into monsters.

Lin Feng was trapped in his dorm for three days, on the verge of starving to death.

Just when he thought he was done for...

[Ding! Doomsday Sign-in System activated!]

[First sign-in reward: 1 military cleaver]

Well, a knife is better than nothing.

On the second day of sign-ins, he got a pistol.

On the seventh day, he got an ability-awakening serum.

On the thirtieth day, he got a nanotech battle suit.

Lin Feng looked at the cleaver in his hand, then at the zombie lord across from him.

“Maybe I should sign in for a few more days?”