On the official site for the manga written by Riku Sanjou and illustrated by Masaki Satou, Fuuto Tantei, the work was reported to have exceeded 1.7 million cumulative circulating copies in its nine published compilation volumes.
Sanjou and Satou began publishing the manga in Shogakukan publisher's Weekly Big Comic Spirits magazine since August 2017. The publisher published the eighth compiled volume on March 30, and will publish the ninth on November 30.
Synopsis of Fuuto Tantei
In the city of Fuuto, criminals make use of USB-like devices called "Gaia Memories" to turn into super powerful monsters known as the "Dopants", wreaking havoc on the peaceful city. However, there are also heroes who use the "Gaia Memories" to fight against these criminals, one of whom is the self-proclaimed detective Shoutarou Hidari. With the help of their partner Philip, the two transform into Kamen Rider W., the legendary hero of the city of Fuuto. After the fall of Museum, an evil criminal organization responsible for the chaos in Fuuto, the production and distribution of the "Gaia Memories ”stopped. However, the remnants still remain in society, and are sold on the black market at high prices. Because of this, the two heroes of the Narumi Detective Agency have not yet had time to relax.
Source: Manga Mogura
© 石 ノ 森 章 太郎 (原著), 三条 陸 (Writer), 佐藤 ま さ き (イ ラ ス ト) / SHOGAKUKAN 小学 館