앉아, 기다려, 키스해

Ma Sung Jun does part-time job at animal adoption cafe. One day, after finishing his shift and going home, he finds a lost dog of mysterious species. In usual cases, he likes cats more than dogs, but for some reason he takes the dog home. He calls the dog Tani and leaves his home to get things he needs to take care of Tani. When he comes home he finds Tani is no longer a dog?