An omake included in Volume 6 of the Dandadan manga series.
Synopsis[]
After opening a bag of chips, Turbo Granny asks Seiko why the packaging is so flashy. Seiko explains that it is designed to prevent the formation of fatty acid peroxides, a toxic substance. Turbo Granny then challenges Seiko's knowledge, warning her not to act as if she knows everything. Seiko calmly replies that she only knows what she knows. To counter, Turbo Granny offers her own trivia, claiming that eating too much chocolate causes nosebleeds, but Seiko casually dismisses it as a myth. Determined to test her further, Turbo Granny proposes they go shopping together. While carrying groceries, she asks why umaibo sticks cost only ten yen despite being so tasty, to which Seiko explains that effort and craftsmanship go into making them.