The End of the World: Build an Obedient Army and Obey Absolutely

[Doomsday + Rebirth and Revenge + Yandere Sister + Gaga Shuang + System] As the apocalypse approaches, Ling Yun is betrayed by her school belle classmates and fed to her by a zombie transformed by her boyfriend. However, Ling Yun was reborn and awakened the system. From then on, he said goodbye to morality! After reviving his life, Ling Yun will make everyone who has hurt him regret coming into this world! "What?! Morality?" "In these apocalypse, strength is morality, and the weak only deserve to crawl!" When others have nowhere to stay, Ling Yun is living freely in this apocalyptic world. He also personally built an army that would absolutely obey any of his orders...