二十一世纪初期，人类延长寿命的生化技术在全世界得到了推广，同时日本凭借着成熟的机器人制造业技术成功跻身该行业的龙头老大，独占着全球市场。但是这项技术有着极高的危险性，联合国制定了严格的规定，日本的利益受损便愤然退出联合国席位并采取了震惊世界的极端行动——锁国

时间来到2067，日本在国土周围建起了遮罩装置，从此其他国家再也无法得知日本的内部情况，十年以后美国的特殊部队奉命前来探查情况。然而日方早已经知晓这一行动，并布下圈套等他们进入。后来在大家的掩护下故事女主角成功踏上了东京的土地，她惊讶地发现了这里的情况远远超出了大家的想象，日本的实际情况和外界的猜测其实完全不同，她们渐渐的了解到大和重钢正在日本秘谋着一次大规模的实验，并将这个计划推广至全世界……

At the beginning of the 21st century, biochemical technology to prolong human life has been promoted all over the world. At the same time, Japan has successfully entered the The industry's leading boss, monopolizing the global market. However, this technology is extremely dangerous. The United Nations has formulated strict regulations. When Japan's interests were damaged, Japan angrily withdrew from the United Nations seat and took an extreme action that shocked the world-locking the country

When the time came to 2067, Japan built a masking device around the country, and since then other countries can no longer know the interior of Japan Ten years later, the special forces of the United States were ordered to investigate the situation. However, the Japanese side has long been aware of this action, and set up a trap to wait for them to enter. Later, under the cover of everyone, the heroine of the story successfully set foot on the land of Tokyo. She was surprised to find that the situation here is far beyond everyone's imagination. The actual situation in Japan is actually completely different from the speculation of the outside world. Yamato Heavy Steel is secretly planning a large-scale experiment in Japan and spreading this plan to the whole world...