Two boys in middle school, Tetsu and Yuki, went on an adventure to explore an autumn festival. Tetsu had on a mask and walked solemnly as they made their way to the shrine where the celebrations were happening. Along the way, they saw a Hyottoko mask, a railroad crossing, an off-season yukata, and miniature cakes. Even though the journey was only fifteen minutes long, it turned into a remarkable autumn evening that bonded the two best friends even more.