Shin SOS Dai Tokyo Tankentai

An elementary school student named Ryuuhei discovers his father’s old notebook describing a treasure hunt in Tokyo’s underground tunnels while preparing to move. He invites three online friends and his younger brother to join him in searching for the treasure. During their exploration, they encounter an underground community of unusual individuals, among them an elderly soldier who continues a mission from World War II.

Traduzione in corso — testo originale in inglese.