Kill Through the Apocalypse! Just to Accumulate Intimacy

[The end of the world + single heroine + brotherhood + no rebirth + stocking up + system + growth + construction + funny] The end came without warning. Lang Ren became the Chosen Son bound to the system, Can I bind if the intimacy level exceeds 90? Have you ever thought that if the intimacy level is 90, you only need to be willing to kill zombies for me? Then my team has to be all-inclusive. "Brother, are you willing to help my brother get rid of the zombies in front of him?" "Little sister, are you willing to fight against zombies for me?" "Zombie brother, are you willing to kill zombies for me?" "Nani? Did I hear you right? You actually asked this zombie." "Brother, you are a werewolf. You are a werewolf. This zombie was born to kill zombies." "What kind of world is this world?" "Who are you anyway?" "Why have all my brothers disappeared?" "Who am I?" "You don't need to know" "Mission 227 has been completed, please give me instructions."