A.D. Police: To Protect and Serve (Original Japanese)

Kenji Sasaki is a young hotshot AD Police member who likes to solve cases by himself and ignores his partner, Paul. But when Paul gets seriously injured on a mission, Kenji goes to a bar and has a fight with a German man named Hans.

Kenji and Hans don't speak to each other but end up rescuing Paul using teamwork.

The AD Police go on a mission to destroy a Voomer factory.

Kenji makes a promise to his girlfriend Kyouko that he will be at her music concert, but she gets kidnapped. Kenji goes to save her.

Liam gives himself up to the police. He claims that he made mistake at work that he is afraid that his boss, Mesion, will punish him so he is willing to trade industry secrets with the police in exchange for his safety. AD Police believe him and set up a trap for the latest Genom voomer delivery car that Laim said Meison are targeting.

The AD Police successfully seized many illegal voomers from the Paker Syndicate. It was all because of Jose's great trap that the mission went so well. But Liam gets very angry and kidnaps Jose's wife and kid. Liam asks to trade Jose's family's safety for the illegal voomers.

AD Police is keeping an eye on Liam after they got information that Liam secretly trading with Genom Tower. Kenji and the other members set up a mission to capture Liam and chase him into Genom tower. Suddenly a mysterious old man shows up to protect Liam and set him free.

Kenji's only relative-his grandfather visit AD police office looking for Kenji. But Kenji refuse to meet him and sneak to the bar Lost City. Kenji's teammates later visit Lost City and try to convince him to meet his grand father. But Kenji decline there is no need to bring up memories of his past.

Hans is seriously injured in a battle with voomer. Kenji taught Hans will never recovered but to his surprise, Hans recover in an amazing speed! Kenji suspicious about who Hans really is and checking Hans's blood to find the truth.

AD Police member happily welcome Hans back to office but Kenji is holding an complex feeling. The first job after Hans come back is tracing Liam who stole the latest bio-voomer earlier.

Liam is tracked into a corner by AD Police but he escape into reactor in the center of Tokyo. He pulls out the control rod of atomic reactor and decides to bring Tokyo with him to hell. Kenji are ready to give up his live to stop Liam but Hans knock him down and entered the reactor instead. Hans assured he is a bio-voomer and transfigure to a ugly bio-voomer to kill Liam.

Kenji rush to Genom Tower to rescue Hans who is captured by Genom. Kenji and Hans are about to escape to somewhere Genom couldn't reach them but it is too late. Hans's transfiguration getting more serious and the chairman of Genom-Umihara is attacking Kenji for Kenji knows too much. Hans and Kenji team up again to destroy Umihara but Hans has run out of his strength and pass over in silence..