Shiitagerare Reijou wa Hitogirai no Mahoutsukai ni Deshiiri suru

Excia has had to endure her stepmother and stepsister's relentless ab*se since she was young. Her best friend and only source of emotional support is Hattie, a wild puppy she met one day. But when her stepfamily causes harm to him, Excia can bear her torturous family no longer, She runs away and wanders into the forest in despair. However, it is there that she encounters Gracies, a wizard with a hatred for humanity and a fondness for animals. Little does Excia know it, but her life is about to transform... (Source: MangaPlaza)