Nirvana fired on Caitshelter! But, in the nick of time, Hibiki and the others appear in the magical bomber Christina, and block the attack. And furthermore, they know the way that Nirvana can be stopped! Hibiki tells everyone that the way to stop Nirvana is to destroy the lacrima in each of the six legs simultaneously. Everyone is covered in battle wounds, but they still haven't given up hope! Can Natsu and the gang stop Zero's evil ambitions?

After getting Natsuki hurt when a small dog barks at them, Ryoku questions if he is useless to Natsuki and gets depressed. Moping by himself, Ryoku finds a partitioning screen in Natsuki's house which has a powerful dragon and a tiger drawn on it. According to Natsuki's grandfather, the dragon and tiger are said to have been rivals, fighting for the position of the strongest in the world since olden times. Hearing that, Ryoku is determined to become a powerful dragon that can protect Natsuki and begins to train. However, the next day, upon hearing a loud noise from the room with the screen, they take a look and find a huge hole where the tiger was. Natsuki and Ryoku both find this strange. Truth is, there is a legend that the tiger drawn on the screen sometimes jumps from the screen and prowls around.

On the back of Oga's fist a mark appears that is proof of his contract with the son of the Demon Lord, Beelzebub... The Zebul Spell. After hearing that the demonic power grows as well as the Zebul Spell the more he gets into fights and runs wild, Oga decides not to fight anymore to avoid that situation. However, Himekawa Tatsuya, heir to the Himekawa Zaibatsu and one of Ishiyama's TKKH like Kanzaki, is secretly plotting to do Oga in himself, and gives the command to his lackeys...

Zazie finds out where the Cabernet ended up, but also finds a Reverse cell nearby at Shark Cape. There Zazie clashes with a Marauder who calls himself Jeel. Zazie shoots his shindan that consists of his malice, Blue Thorn, into Jeel, but Jeel's deep seated hatred for the Amberground government renders it ineffective and Zazie is cornered. On the other side, Lag heads toward Shark Cape after receiving word from Zazie, and encounters the leader of Reverse, Lawrence! Lag tries to shoot him with his shindanjuu, but for some reason he can't load any shindans...

One day, when Aichi pops his head into Card Capital, Morikawa is fighting a kid he's never seen before. The kid is so powerful, Morikawa can't even scratch him. His name is Kamui Katsuragi, and he's a famous grade-school fighter in the area.