Doraemon Sad Sticker features the titular character from a Japanese manga series written and illustrated by Fujiko F. Fujio. This story is about an earless robotic cat named Doraemon, who travels back in time from the 22nd century to aid a boy named Nobita Nobi. He has big eyes, a red circular nose, and a big mouth consisting of huge teeth. He resembles a raccoon dog and has a red tail that acts like a power lever.