Tettou no Shoujo

Ritarou Akaike, the eldest son of a family that owns a western bookstore, accidentally runs into a hostage standoff incident at the prefectural office. However, this was just the beginning of a huge scheme that had been meticulously planned.

Ritarou, with the help of his childhood friend, Seiran, and Boris, who works at the British embassy, pursue difficult cases that continuously occur, which all seem to have some sort of inexplicable connection with one another. As they pursue such cases, time and time again they have a vision of a mysterious steel tower and a little girl standing next to it. Are these visions some sort of message?

Based during the early Shouwa period in the international city of Yokohama, where foreigners were making huge strides, a story where mystery calls upon more mystery -- begins now.