Inu ni Nattara Suki na Hito ni Hirowareta.  

Inu ni nattara suki na hito ni hirowareta, My Life as Inukai-san's Dog, 犬になったら好きな人に拾われた

The narrative revolves around the main character who suddenly becomes Pochita, Karen Inukai's adorable dog companion, on a particular morning.