Two brothers wearing bunnysuits hop on a phallic train and travel to a mysterious underwater brothel.

Paperakyu is an unknown disease, the only symptom is the growth of small limbs (like crab claws) on the head.
Our unnamed protagonist is affected and as such is treated as an outcast of society.

It started with a brutal beating at a pachinko parlor, and now Bakune Young-maniac, moron or mastermind -- has taken Japan's biggest crime boss as a hostage as Step One of his plan to rule the world! Soon, yakuza, police, hapless detectives and Bakune's former gym teacher collide as Bakune holes up with his hostage in Osaka Castle, and the manly men of the Japanese mob vow to do anything to rescue their boss! Can Russian-roulette-playing police chief Sorigami salvage the situation with his highly trained army of human robots? Will Johnson Membodeath, the ninja, stop the madness by killing everyone in sight? Savage satire of the action-violence manga genre!