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Ano Hi Chikyuu ni Dungeon ga Shutsugen Shita That Day Dungeons Appeared on Earth
También conocida como: That Day Dungeons Appeared on Earth, あの日地球にダンジョンが出現した, あの日地球にダンジョンが出現した(コミック) · あの日地球にダンジョンが出現した · That Day Dungeons Appeared on Earth
One day, a huge dungeon appeared all over the world. Amekawa Hotaru, a withdrawal high school student living in Hokkaido, is trapped in a dungeon that appears near his house. Hotaru who managed to return to the ground saw the appearance of a monster that sneaks around the world!