I Transmigrated to the Apocalypse and Became Half-Infected

Half-infected + a little like LifeAfter + apocalypse + System + a bookworm with 2,000 hours of reading

After seeing my predecessors transmigrate after dying for all sorts of ridiculous reasons, I thought something like that could never happen to me. But I died because I strained too hard while pooping on the toilet and couldn’t catch my breath. I transmigrated to a world a little like LifeAfter, but somehow I’d become a... and not just any...!