Son of the greatest detective in Steam City, Narutaki takes up the mantle after his parents&#039; death. He is considered by some a child genius, but an annoyance by others. He is compassionate, and sometimes naive in his attitude towards both his citizen charges and the villains he pursues. Narutaki loves Steam City and vows to protect it from danger. His investigation style is similar to Sherlock Holmes. He uses a multi-purpose gun and various tools to aid his investigations. Despite his young age, he drinks very strong coffee and has an eye for pretty ladies. He also has a passion for toy models

The scene is Steam City, a London-ish city which represents an entire civilization run by coal and steam power. Because of steam, the city is sometimes covered in a mist. Villains take advantage of the steamy mist to hide and execute their evil plans. Only a few dare venture into what's beyond the steamy mist. They are known as the Steam Detectives: Narutaki (and his convertible all-purpose pistol), his nurse-assistant Lingling, and his Megamaton robot Gohliki.
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(Source: Anime News Network)

A Steampunk mystery from the creator of Silent Mobius! In this tale of a past (or future?) that never was, in the age of Steam, masked dandies, dastardly supervillains, and sentient machines stalk a Japanese Gotham by night. Are the sharp wits and quick reflexes of wunderkind detectives Narutaki and pretty nurse Ling Ling enough to thwart evil and unravel the mysteries of this strange world? All steamed up.... When Narutaki meets Ling Ling, a pretty nurse with a dark secret, he gains both a true-blu friend and two new assistants. He'll certainly need all the help he can get when he is forced to do battle with such nefarious villains as the Phantom Knight, the Machine Baron, and Dr. Guilty!
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(Source: Viz Media)