Renzoku Satsujin Oni Kaeru Otoko (Takarajimasha Bunko)

[Machine Translation] A woman's naked body, hooked over the mouth and hanging from the 13th floor of an apartment building. Beside her is a poorly written statement of the crime, as if written by a child. This was the first crime committed by the "Frogman," a killer who plunges the city into a whirlpool of fear and chaos. While the police investigation makes no progress, the second and third murders occur, and the town is in a state of panic... What is the purpose of the Frogman, who continues to commit bizarre murders in an uncontrolled manner? What is his true identity? Can the police stop the murderer?

口にフックをかけられ、マンションの13階からぶら下げられた女性の全裸死体。傍らには子供が書いたような稚拙な犯行声明文。街を恐怖と混乱の渦に陥れる殺人鬼「カエル男」による最初の犯行だった。警察の捜査が進展しないなか、第二、第三と殺人事件が発生し、街中はパニックに…。無秩序に猟奇的な殺人を続けるカエル男の目的とは?正体とは?警察は犯人をとめることができるのか。