Part 4/10:

As the annual PK High School Festival approaches, Kusuo feels an urge to maintain the status quo and ensure nothing disrupts the festivities. The school bell rings, announcing the festival's impending arrival, and with it comes chaos. A classmate proposes an interesting, albeit absurd idea: creating a stone exhibition out of oddly shaped rocks scattered across campus. The decision foreshadows the mix of hilarity and pandemonium that will ensue.