Original title was 幽霊ゴムボート (yuurei gomubouto). Apparently inflatable raft is gomu (rubber, loanword from Portuguese gum, I think?) and bouto (boat, from English).

I wonder if this cover is making fun of itself for having a bikini shot take up the entire focus or just referencing paranormal photos.

July 30th, 2014. Author's note:
"Q: What do you buy when you go to a convience store?
A: Pepsi."

Now we know.