Wanwan Monogatari ~Kanemochi no Inu n shite to wa Itta ga, Fenrir ni shiro to wa Itte nee!~Wanwan Monogatari; WanWanMono; Woof Woof Story ~I Said Make Me a Rich Man's Dog, But I Didn't Say Make Me Fenrir!~; Woof Woof Story ~I Told You I am a Rich Person's Dog, Not Fenrir!~; Woof Woof Story: I Told You to Turn Me Into a Pampered Pooch, Not Fenrir!; Собачьи истории ~ Говорю же, я пёс богачки, а не Фенрир! ~; ワンワン物語 ～金持ちの犬にしてとは言ったが、フェンリルにしろとは言ってねえ！～; 멍멍이 이야기 ~부잣집 개로 부탁했지만, 펜릴로 만들어달라곤 안 했어!~

The isekai fantasy story centers on a man who dies due to overwork, a phenomenon that has unfortunately become a known problem in Japan. Just before dying, the man thought that if he was reincarnated, he would want to live the lazy life of a rich man's dog. His wish is granted, but it doesn't turn out the way he anticipated. He comes back to life in another world as Rōta, a dog who belongs to the daughter of an extremely wealthy person. However, at just one month old, he is easily larger than a human, and he realizes he is no ordinary dog.