The Underdogs and their classmates are taking a break to go to Camp Ruffing It for a few days of camping activities, but all the sounds and smells of the forest keep distracting Harley, causing trouble for everyone.

Toshinari Seki takes goofing off to new heights. Every day, on or around his school desk, he masterfully creates his own little worlds of wonder, often hidden to most of his classmates. Unfortunately for Rumi Yokoi, his neighbor at the back of their homeroom, his many games, dioramas, and projects are often way too interesting to ignore; even when they are hurting her grades.