Allied for humanity (Demon slayer x WW2)
It has been nearly two years since the allies have occupied the country of Japan after the closing of WW2. But little do the allies know of the secret war that has been going on in the country for over a thousand years. The war between humans and demons. However, for one US Marine and one Royal marine they will find out about this secret war by encountering a young boy with a green and black checkered kimono.…