After being worked quite literally to death, corporate slave Routa Okami's dying wish is to be reborn as the well-loved pet of a rich family. When a compassionate goddess actually grants his wish, Routa commits himself to the lazy, carefree, all-you-can-nap lifestyle of a pampered pup-complete with a beautiful owner and all the delicious food he can eat! But as Routa grows...and grows...and grows...he realizes something is terribly wrong. With his enormous body, razor-sharp teeth, and fierce visage, it's painfully obvious that he was reincarnated not as a dog but as a giant wolf. And not just any wolf-the legendary wolf king Fenrir!

“I just want an easy life, even as some rich person’s dog...” As corporate slave Routa Okami keels over in the middle of his busy office, he imagines how nice it would have been to live as the pet of some rich family instead of working himself to death. But when a goddess actually grants that wish and brings him back to life as a pampered pooch, Routa realizes he may have gotten more than he bargained for...

Well, everyone saw this coming...With an appetite fit for the King of the Fen Wolves, it was only a matter of time before Routa grew too big for the mansion. This dog needs diet and exercise! ...Okay, that's too much effort. Thankfully, there's more than one way to achieve a smaller form, and he knows just who to turn to for a lesson in shape-shifting! But as the full moon rises, Routa soon learns that a battle with weight loss isn't the only challenge headed his way-Carmilla, haughty vampiress and a general of the Demon Lord's army, takes the stage! And she's got her sights set on Lady Mary!

With the leaders of the Demon Lord’s army pacified, the truth of Mary’s illness is finally revealed. The mysterious force eating away at her life is the very seal that keeps the Demon Lord contained! The only way to cure her is to stop the seal from ever being placed, but to do that… Routa will have to travel one thousand years into the past, back to where it all began, and rewrite history! Routa would do anything to preserve his pampered-pooch life. But when asked to put it all on the line to save the one he loves most, the choice is simple… It’s time to face the Demon Lord!

A series of unexpected events has brought yet another general of the Demon Lord into the employ of the Faulks mansion…Belgor, formerly disguised as the holy sword, is settling into his new post as a kitchen knife. It’s looking like it might be a while before Routa’s life returns to normal. In fact, it’s almost as if everyone’s forgotten his role as the family pet, seeing how he’s called to search for missing pups and fight against evil with Alstera in the Royal Capital. But when the mansion faces a water shortage, Routa is among the first to volunteer in the search for answers! After all, no water means no baths, which is unacceptable! It looks like another of the Demon Lord’s minions might be responsible for this…but it’ll take more than their army of generals to keep Routa from living his best pet life!

“It’s like I I’ve come to an alternate fantasy world...!!” Now that Mary’s feeling better, the family sets off on a business trip to the Royal Capital! After they arrive, Mary and Routa head out to explore the city when they run into a young girl known as the “Monster Maiden,” and she wants to add Routa to her collection! She invites the two to her house, where they find an assortment of ferocious beasts who don’t seem too keen on obeying their master...

“That...wouldn’t be anything like the fun pet life I wanted!!” Now that Mary’s fallen ill, Routa’s pampered-pooch life is in jeopardy! In order to cure her once and for all, he’ll need to do some actual work for a change! The medicinal flower he seeks, however, is guarded by a fearsome dragon, and he’s got a lot of ground to cover if he wants to make it to its lair. Will he be able to overcome his trauma for the one he loves most, or is Mary doomed to relive this cycle of sickness every year?