カンナが作った、プッチーの気持ちが分かる翻訳バッジで盛り上がる天文研究会一同。そのとき怪獣アラートが鳴り響き、宇宙から謎の星獣が飛来する！
なんとか星獣を退けたテオと巨大化プッチー。戦いの近くにいた親子を心配するイブキの前に現れた少年は、いきなりイブキの正体を見抜いた発言をして……！？
一方、UTTFの今日子は、天文研究会がプッチーを匿っている証拠をついに掴み部室に迫る！
The members of the Astronomy Club are full of excitement over a translation badge created by Kanna that reveals Pucchi's feelings. Just then, the kaiju alert rings out, and a mysterious star bem flies in from outer space!
Teo and Giant Pucchi manage to repel the star bem. Worried about a parent and child who were near the battlefield, Ibuki approaches them, only for the young boy to suddenly make a remark that completely sees through Ibuki's true identity...!?
Meanwhile, Kyoko from the UTTF finally uncovers concrete evidence that the Astronomy Club is harboring Pucchi, and she closes in on the clubroom!
