In a mythical kingdom, the mighty Imperial Knights harness a magical substance known as Aer to power their weapons and protect humanity from the monsters of the forest. But something strange is afoot; the Aer is somehow changing, causing the wilderness to waste away and stirring the woodland beasts to attack with greater frequency. As danger creeps steadily closer to civilization, two young recruits - Flynn, the rigid son of a fallen hero, and the rebellious and brash Yuri - must ride with their fellow Imperial Knights to distant ruins in hopes of uncovering the truth behind the transforming Aer.
The story takes place on a world 100 years in the future, a few years before Lisa and Lorna joined eX-D organization. The world where people drives computer-controlled electrically powered "AI cars" which automatically take you where you want to go. However, one AI car mysteriously start to run amok. Now Nina and Rei, as the main driver for ex-D organization have to solve the mystery behind the AI car with evil plot and trap awaiting for them...
It has been three spring-times since Belldandy came to Earth to grant Keiichi one wish. Things seem to be fine with them while living in the temple with Belldandy's sisters Urd and Skuld, but little do they know that a fallen god from Belldandy's past has escaped from his lunar prison. He has plans for everyone which do not include what the goddess and her human lover wanted for themselves.
Officers Tsujimoto and Kobayakawa are transferred back to Bokuto Police Station after stints in other police departments. Shortly after this, the discovery of smuggled firearms and the recovery of a magnetic disc herald new troubles for Bokuto station as the Chief is thrown in jail for keeping silent over "Bee Number One", developed by Detective Emoto who went missing two years ago.
Officers Tsujimoto and Kobayakawa are transferred back to Bokuto Police Station after stints in other police departments. Shortly after this, the discovery of smuggled firearms and the recovery of a magnetic disc herald new troubles for Bokuto station as the Chief is thrown in jail for keeping silent over "Bee Number One", developed by Detective Emoto who went missing two years ago.