Mame Shiba apparently translattes literally to Bean Puppies, and is a nickname for smaller japanese dog varieties. Apparently the term has been borrowed for some creeptastical anime:
There are magical pixie beans inside your Natto! This must be the vegetarian version of suicide food. I’m going to ask the Biwa kids about this when I seem them next. Thanks to Katie for this one.
I like to think the creepy beans tell you the exact moment when you die. It’s so weird!