CHRIS IS ON THE CASE! Hinata, a shy boy in the fifth grade, receives his first-ever pet when his grandfather brings him Chris, a retired police dog with excellent training and top-notch skills. There’s only one problem: Whenever Chris sees a bug, they fly into a panic. Soon, however, their nose is put to the test, when during a walk, they hear police sirens blare… There’s been a robbery at a nearby jewelry shop! As the police investigation stalls, Hinata and his plucky pooch stumble across...

NEVER FEAR, CHRIS IS HERE! After a mysterious girl leaves behind her handkerchief at Marron Veterinary Clinic, Hinata and Chris set out to return it. But when Chris follows the girl’s scent, the pair find themselves in front of a spooky, seemingly abandoned mansion. And is that a z-z-zombie?! Hinata has no time to be afraid, though — he’s got to protect Chris! Together, can the two of them solve the mystery of the eccentric old house?

TROUBLE ON THE HIGH SEAS! Hinata, Mayuka, and Chris are invited to attend a classmate’s recital on the luxury cruise ship Primavera. But they were supposed to go home before the ship left port, so why are they now in the middle of the ocean?! And as if that wasn’t bad enough, a violin worth millions has vanished from right under their noses! Once again, it’s up to Hinata and Chris to catch the culprit and find the missing instrument. But what happens when Chris is taken, too? Will Hinata e...