An apocalyptic world rushing toward ruin as a zombie outbreak erupts.

I was overworked like a slave and barely managed to awaken, but I was murdered in just one day.

I thought I died, but when I opened my eyes, it was 3 years ago, right after the apocalypse broke out.

Since I lived as a slave, in this life I decided to become the master and make a slave harem.

Although the meaning of 'slave' is a little different from what I knew.