An extra included in Volume 3 of the Dandadan manga series.
Synopsis[]
Seiko urges Momo to get ready and join her at the Bon Festival. Momo refuses, complaining about stepping out in the hot weather. Unwilling to take no for an answer, Seiko, while dashing out of the house, challenges her granddaughter to a contest: if she manages to buy a GariGari‑kun first, she must accompany her and dance to every festival song. Noticing Seiko getting a head start, Momo calls her a cheater and attempts to catch up to her. After running into Okarun, Momo climbs on his back and urges him to outrun Seiko. Okarun obliges and transforms into his Turbo Granny form to speed past Seiko. While Seiko calls Momo a coward for this, Momo rejoices in getting the better of her and demands an allowance from her grandmother if she were to win the contest. However, Okarun ends up running past the candy store, allowing Seiko to win. Despite winning, Seiko, by the time Momo and Okarun arrive back home, decides to cancel on going to the festival after she enjoys watching Bakatono, prompting Momo and Okarun to remark how scary she is.