Ryu Yamada is a second year student at Suzaku High. Ryu is always late for school, naps in class and gets abysmal grades. His life is a dead bore. The beautiful Urara Shiraishi, on the other hand, is Suzaku High\'s brightest student. One day, without explanation, their bodies are swapped! Ryu ends up in Urara\'s body, and Urara in Ryu\'s.

What would you do if the dog you picked up transforms into a human that wants to do "stuff" with you? 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?