I looked into the address on the DMCA claim, and they aren't as they appear.
"Remove Your Media, LLC" has an address that's really a place named "Farmbyrd" in Plano, Texas. They seems to serve rotisserie chicken. Unless Farmbyrd offers law services I'm unaware of, that looks wrong.
Then I looked into "Stone & Vaughn Law" and their address took me to a "Pack 'N' Mail" in Denton, Texas. Again, I don't think a mail centre offers legal services either.
The only thing in common with "Stone & Vaughn Law" and "Remove Your Media" is that both have emails and a website as their sole presence, barring the former having a phone number.
Looks like Viz Media hired copyright trolls and they're going bonkers again.