Companion System: a Guide to Creating a Harem in the End of the World

The end of the world is coming, and crises are everywhere. I accidentally awakened the companion system, and it was like I had a new bargaining chip in my destiny. Since then, I have relied on this to fight through obstacles, shuttle through ruins, and run between the roars of zombies and dangerous traps. I have reached out to help again and again to save the girls who are struggling in despair, and have taken them under my command one by one to build my own romantic harem! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.