secret Short is actually a deleted scene.

I own all 5 versions of "the Grudge." On the extended uncut american version it has some of shimizu's shorts as early works or concepts for the movies, but in fact the short titled "in a corner" is actually a deleted scene from Ju-On the curse. In the scene it shows the two schoolgirls who are assigned to take care of the rabbits at the high school near the garden. it shows kayako kill them both. However the girl whose body is found with the other girls jaw lodged in her stomach, never entered the house or was implied to during any part of all 5 films.
and i can prove that this is a deleted scene due to the fact that the girl who gets her jaw ripped off in "Ju-On the curse" is the same actress in the same outfit going by the same name.