イブキの希望で、合宿に行くことになった天文研究会とプッチー。
みんなで楽しくキャンプの準備をしている最中、明心大学に来る前のことを聞かれイブキは在りし日の故郷を思い出す。
と、感情が溢れるイブキの近くで、突然プッチーに巨大化の前兆が起き始めて…！ そして、プッチーたちは驚きの光景を目撃する！？
At Ibuki's request, the Astronomy Club and Pucchi head out on a Training Camp. While everyone is happily preparing for the camp, Ibuki is asked about his life before coming to Meishin University, triggering memories of his long-lost home planet.
Just as Ibuki becomes overwhelmed with emotion, signs of another giant-sized transformation suddenly begin to manifest in Pucchi right beside him...! And then, Pucchi and the others witness an astonishing sight!?
