The Difficult Task of Traveling Through the Apocalypse

When the end of the world comes, humans and zombies will either die or live. However, the task given to her by the system is to make humans and zombies - and! Flat! Common! At! Omg! She refused in her heart! But the reality has become this, she can only bite the bullet and go up. The happy and playful female protagonist VS the clean and gentle male protagonist. There is a space system for cute pets. Let's upgrade and fight monsters together!