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Shin SOS Dai Tokyo Tankentai
SOS! Tokyo Metro Explorers ／ SOS! Tokyo Metro Explorers: The Next ／ 新SOS大东京探险队 ／ 新SOS大東京探検隊
Description
While packing for a move, elementary‑school student Ryuuhei discovers his father’s old school notebook, which contains a map to a treasure hidden in Tokyo’s extensive underground passages. He brings his little brother along, and together with three friends he met in an online chat room, they set out to find the treasure. Instead of riches, they encounter an entire subterranean community of eccentric characters, including a senile old soldier who still carries out a World War II‑era mission.
