It's just a light novel someone's been working on for a couple years but there's some artwork interspersed in some of the chapters. He bashes in the head of essentially the Shield Hero protagonist pulling a catgirl slave behind him with a rock in the first chapter. He then begins a protracted people's war to liberate the rest of the slaves of the world he was transported to.
is this from an actual manga because that would rock
unfortunately it is more of a webnovel: His Soul is Marching On to Another World; or, the John Brown Isekai
It's just a light novel someone's been working on for a couple years but there's some artwork interspersed in some of the chapters. He bashes in the head of essentially the Shield Hero protagonist pulling a catgirl slave behind him with a rock in the first chapter. He then begins a protracted people's war to liberate the rest of the slaves of the world he was transported to.
https://www.royalroad.com/fiction/57505/his-soul-is-marching-on-to-another-world-or-the