Gunma-chan, Uncle Akio, Aoma, and Meemi visit Gunma's kofun site and wander into an alternate world beneath Gunma in the Season 2 finale.
Naha-naha-naha! I admit my full defeat!
Admito mi derrota.
Admito mi derrota.
Nahanahanaha! Ammetto la sconfitta!
Naha-Naha-Naha!