This episode serves as the Season 1 finale and focuses on the high stakes of Homecoming week at Bringston University.
: "Why Oxygen and Nitrogen Are Irreplaceable." It covers the discovery, subatomic structures, and critical roles these two elements play in Earth's atmosphere and biological systems. [S1E13] Irreplaceable
: The Kazemai Kyudo Club prepares for the final match of the tournament. The episode focuses on the "Tsurune" (the sound of the bowstring) and the deep, irreplaceable bonds formed between the teammates as they face off against Kirisaki High. This episode serves as the Season 1 finale