Manga by author Inumajin - Status ongoing

Synopsis from Kadokawa:Cheats for fluff! The reincarnated Saint doesn't care about dignity!Kanata is a girl known as the reborn "Saint". With such talent, the profession she chose is... the weakest "monster tamer"!?Kanata, who finished her previous life alone in a hospital room, only wants to adore and become friends with fluffies all over the world! If there's a dragon aiming for fluffies in the east, it'll be punished with powerful magic, and if there's a foul smell in the west, the entire city will be purified so the fur won't smell!When I used my cheats for fluffies, I was worshipped as a Saint by the people I accidentally saved!?Synopsis from Niconico Seiga:"Finally, finally... I can touch fluffies!"Kanata is a girl known as the reborn "Saint". With such talent, the profession she chose is... the weakest "monster tamer"!?That's right, Kanata, who reincarnated from a previous life of loneliness, has chosen to use her cheats to pat all the world's fluffies. All you have to do is adore them to the fullest!!A fast-paced girl's otherworldly adventure story, comicalized! Artist's Twitter: https://twitter.com/iida_101Web Novel (Raw): https://ncode.syosetu.com/n5694fk/

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 Rta, 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.