Joou no Hyakunen Misshitsu

For one hundred years, no outsider has set foot inside the Queen's kingdom... The mysterious realm remains closed off from the world, its ruler said to be developing revolutionary scientific methods in complete secrecy. When Michiru, a curious foreign researcher, finally gains access to this isolated land, she finds herself drawn into a web of intrigue surrounding the enigmatic Queen and her hidden kingdom. What secrets lie within these forbidden borders, and what price might be paid for uncovering them?