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.
The two unimaginable super 
ultra energy sources clashed
Zwei unberechenbare Energiestrahlen
kollidierten miteinander,
Las dos grandes energías colisionaron
Las dos grandes energías colisionaron
L’impact de ces deux énergies
phénoménales et incommensurables
Le due incommensurabili
fonti di ultra energia si scontrano
As duas energias super-ultra
inimagináveis se batem
Две непостижимые энергии столкнулись