Part 1: Komasan tries to explain to Komajiro why all the people of the city are talking, but not to anyone near them, but Komajiro realizes that they are all talking on their cellphones, and he takes his own out, but he cannot get a signal. Komasan, even more upset about the turn of events, tries to lead him along to a takoyaki shop. However, Komajiro gets a phone call and answers it, and then goes off to play with his friends, leaving Komasan to go get takoyaki on his own.
Part 2: In the middle of class, Keita, Kuma, and Kanchi all hear a fart, but neither of them know it came from them. Keita believes Whisper might have done it, but Whisper says that he cannot fart. Keita scans the room and sees that Fumi has turned beet-red, and as he watches her, she appears to pass gas, again, assaulting Keita and Whisper's senses. Keita realizes that Fumi could not have farted like that, and realizes a Yo-Kai is to blame. He scans the room and discovers Onarazumono, a Yo-Kai that makes people fart. Class ends, and Keita plans on taking Onarazumono to somewhere it cannot affect people but as soon as he stands up, Onarazumono activates his ability on Keita, causing him to pass gas. Keita tries to hold it in, but decides to make it appear like he did not fart, but everyone can start to smell it. He runs out to confront Onarazumono outside, calling on Jibanyan for help, but when Jibanyan is hit by Onarazumono's miasma, he releases a vile fart that nearly consumes them all, until Whisper gives Keita and Jibanyan gas masks and fans to dispell the cloud. Instead, Keita decides to call on another Yo-Kai that will be immune, passing on Jinmen-ken out of fear of his farts, before settling on Robonyan, who as a robot cannot fart, but when Onarazumono attacks, Robonyan lets out a vile gas, which apparently is his internal air freshener. Robonyan slaps his own behind, changing the scent of the gas, until he settles on a floral scent, which affects Onarazumono as well. Robonyan then prod