We all knew this day would come... Routa's pampered pooch life has finally caused him to grow too big to comfortably fit in the mansion! Resolving to go on a diet, he heads to the forest to see if the elves can help him out. And, surprisingly, adventure finds him ready and willing! But no matter how eager Routa may be this time around, he probably wasn't expecting Lady Mary to show up on the enemy roster!

Due to extreme fatigue and terrible work conditions, Routa dies without having done much with his life. As he breathes his last, the only thought in his mind is to be reborn as the dog of a rich family so he can enjoy the good life. A merciful goddess takes his plight to heart and grants his final wish, sending Routa to be reincarnated as the pet of a wealthy young lady! It seems like he got exactly what he wanted, but it soon becomes clear that he's much too large, much too powerful, and gets in too much trouble to be any regular old dog!

After reducing the third of the Demon Lord's generals to a humble kitchen knife, Routa can finally... Okay, who are we kidding? The side quests just keep coming! One of the Fen Wolves has gone missing! Alstera needs help busting baddies in the capital! And...the mansion's experiencing a water shortage. No water means no baths! Hopefully this problem, if nothing else, will be an easy fix. But knowing Routa's luck, it'll be anything but...

In an odd twist of fate, two of the demon lord's generals have entered the service of the mansion. So, surely Routa can take a break and finally enjoy his pampered pooch life, right...? Of course not. With the recent spike in magical activity, a Hero has come sniffing around Feltbelk Forest. What ever will the famed monster hunter do when faced with Fenrir himself?

With the leaders of the Demon Lord's army all contained, the truth of Mary's illness is finally revealed to Routa and company! Now, in order to save her life, he must travel one-thousand years into the past! If anyone gets in the way of his pampered pooch life, he'll send them packing! Even the Demon Lord!

Routa's carefree days continue--with the occasional hiccup in the form of a harrowing adventure. While doing his best to maintain the facade of man's best friend, a party of adventurers on the hunt for a "rare and mysterious dog" visit Feltbelk Forest...