The "V" came from "Cezaimaru Venico", the female detective in the series. Using Hepburn romanization, her name is Sezaimaru Beniko. But, in the story, she hates her name spelled that way.
List of titles
Kuroneko no Sankaku (Delta in the Darkness)
Ningyoushiki Mona Lisa (Shape of Things Human)
Tsuki wa Yuuetsu no Device (The Sound Walks When the Moon Talks )
Yume / Deai / Mashou (You May Die in My Show)
Maken Tenshou (Cockpit on Knife Edge)
Renren Renpo no Enshuu (A Sea of Deceits)
Rokunin no Chouonpa Kagakusha (Six Supersonic Scientists)
Nejire Yashiki no Ridon (The Riddle in Torsional Nest)
