The city of Fukuyama is celebrating the 400th anniversary of the construction of Fukuyama Castle. Shigeo Takahashi (played by Shigeo Ôsako), a director of a video production company, comes from Tokyo to closely interview the mayor of Fukuyama City.

A serial killer comes to a magical girl who is good at divination. She hides in a closet and overcomes the murderer, who sings the nursery rhyme "Momotaro" as he commits his murder, and decides to exterminate him. Accompanied by Kokkuri-san, Merry-san, and Okiku-san, the magical girl sets out to the accidental property where the murderer is hiding.

A surprising sequel to the secretly popular Ichimonji Ken: Prologue! This time, everyone in the city turns into cyborgs!? A must-see for fans of the previous work, with thrilling developments! The struggles of a kung fu boy and a middle-aged man turn into an unexpectedly heartwarming and emotional story! The ultimate action-packed entertainment that surpasses the previous installment is here now!