Jio and his new friend Ball, a member of the resistance group fighting against the corrupt Governor Jaga, are in deep trouble. They've successfully broken into Jaga's lair, but are they strong enough to survive a battle with the notorious criminal Wise Yury? Later, Ruby learns more about her father and the secret origin of the pendant he gave her before his disappearance. Could Ruby's simple trinket be one of the most powerful O-Parts of all?!

His prized O-Part Zero-shiki now busted in two, Jio and Ball strike out to locate the only man who can help them: the mysterious and reclusive O-Parts appraiser Kirin. But when they arrive at Kirin's abode, a cotton candy-like canine greets them instead. Is Kirin, a being so feared for his strength that even the Stea government won't bother him, in fact just a puffy pooch? And will Jio and Ruby ever be reunited?

Jio's friend Ball always dreamed of being strong - strong enough to help the resistance movement stop the maniacal governor Jaga who has a stranglehold on his hometown, and strong enough to defend his friends and his sister. Now that he too is an O.P.T., it looks like Ball might stand a chance! Can he, a novice when it comes to O-Parts, defeat a powerful member of the Zenom syndicate single-handed?

To defeat the legendary O-Part Mexis, Jio was forced to make a dangerous pact with the evil spirit that dwells deep within his heart. Now that the time has come to resume his battle with the man responsible for shattering his old O-Part - Wise Yury, the Crimson Magician - will Jio's newfound strength aid him in stopping this powerful O.P.T., or will his eternal soul be lost in the process?

Now that peace has returned to Entotsu City, Jio, Ruby and Ball strike out for the Ruin of Dastrom where they are told to search for a man named Wick - but the revelations Wick is about to confront them with will be anything but easy to swallow. Is it true that O-Parts are originally from another planet far, far away? And is Jio now strong enough to survive his next run-in with the ruthless Zenom Syndicate?

A chance encounter and a case of mistaken identity pit Jio and Cross against each other in a battle that almost seems foreordained - and though Cross is unaware of the creature lurking inside Jio's heart, he can't fight the strange feeling that they've met somewhere before. Will Ruby be able to intervene before these two formidable O.P.T.s tear each other apart?

The Olympia tournament has begun, and Jio is ready to do battle in the preliminary rounds! But his opponent Anna has some wily tricks up her sleeve... as does Ikaros, the leader of Rock Bird! The action heats up when the tournament moves to a spherical arena where participants can fight in zero gravity! Along the way, Jio meets some more of his fellow contestants, including the steadfast Kite and his ailing friend Yuria. Can Jio win the tournament and help his newfound friends?

Wakamiya has been chasing Yasunari for five years! In order to get closer to Yasunari he joins Kanon University's basketball team, where Yasunari plays. As Wakamiya draws ever closer to his tempting teammate, will he realize the change that has come over him?

Teenage monsters lose their hearts and heads in a relentlessly gory collection of dark humor and horror! Carving a comical niche in modern horror manga, Toru Yamazaki's Octopus Girl serves up disgusting dishes of heartbreak and revenge on land or sea. Have a side order of nervous laughter with your main course of bloodcurdling fear, some gore with your teen angst, and some killer instincts with your kawaii!

Now that she has control over her transformations, Takako is happy to be known as the "Octopus Girl"! Being able to change herself into a teenage head with octopus tentacles allows her to discover horrors in the ocean as well as in Japan. Octopus Girl and Sakae (a wicked girl with the body of a moray eel) face satanic cults, pregnancy, death-trap elevators, violent family strife, and their own backbiting rivalry!

In previous volumes, Takako Unabara - the Octopus Girl - has fought zombies, Satanists, school bullies, and the resilient Vampire Granny. Toru Yamazaki's latest collection of absurdist horror stories pits Octopus Girl and Sakae (her wicked companion who has the body of a moray eel) against alien aggressors, bathroom-invading mutants, jealous teen rivals, and (once again!) the annoying, tough Vampire Granny.

Dr. Osanai Kirihito has uncovered a fatal medical condition that transforms humans into dog-like beasts: the Monmow disease. Dr. Kirihito catches the disease, becoming his own patient.