Terror! Demon-World Trap Holes

Synopsis

Summer vacation begins at Aozora Elementary. Kotaro envies Takeda Katsura, who's headed off to a southern island, but his family won't even let him go on a regular trip, and Kasumi's chewing him out for his grades. Then, somehow, Kotaro finds himself on a southern island. He fell into a hole dug by a demon beast, but blissfully unaware, he enjoys the island solo. Meanwhile Kasumi, Gon and other townspeople, plus actual buildings, have been teleported all over the globe. Yousuke and Rikiya catch wind of the strange phenomenon and head out.