Chapter 11 of Dorohedoro is the fifth chapter of Volume 2 titled, "Eleventh Curse: Competition of the So-Called Underworld"
Chapter Cover
The Chapter cover appears to be Kaiman and Nikaido in Hungry Bug attacking cockroaches in combat and spraying bug spray.
Summary
The story begins with Nikaido fighting in a boxing ring but soon collapses due to exhaustion, a man laughs at her loss and wipes streaks of blood on her face from her nose bleed as he claims the invincibility of another man who fought her named Red Brake.
The scene transtions to Kaiman knocking at the steel garage door of Hungry Bug, assuming Nikaido is asleep; Kaiman walks to her apartment and opens the code-locked door to wake her up. He searches the entire building but finds no sign of nikaido but a flyer advertising a boxing tournament that awards 100 million yen for first place. He also notices a small attic on the top of her bedroom ceiling and enters then picks up a big spider by the web admiring its size; Unknowingly ignoring a menacing looking magic user mask designed as a hockey mask with a gas mask, hung up on a frame behind him. Kaiman hears a loud banging at the door and goes down to angrily demand his identity in which the man is merely here to collect Nikaido's debt. Kaiman reminisces about the flyer he looked at earlier and the prize money, which he finds out her intentions of going there is to pay off her dues.
Worried about Nikaido and his gyoza, Kaiman goes off to find her by following the location of the advertisement. He finds a little shoe store that is guarded by a man who says the entry fee is 10,000 yen to fight, unable to come in for free Kaiman is forced to pay for the fee in order to find Nikaido. The man takes Kaiman down a basement and gives him some clothes to change in a room and tells him to wait too. The room is filled with combatants and Kaiman approaches an claimed acquaintance and asks about Nikaido's whereabouts, the guy tells him how Nikaido came 2 days ago and is going to fight Red Brake to win the 10 million yen. Seeing the amount of fighters, Kaiman assumes Red Brake has to be a magic user.
Kaiman soon enters the ring to fight Red Brake and is put into a muzzle due to his sharp teeth. Before the fight begins, Kaiman asks if he knew where Nikaido was but he answers that he hasnt.