A dejected woman finds an unconscious man resembling her former dog and takes him in as a "pet", forming an unexpected bond as they overcome obstacles together, raising the question of whether such love can exist.

Smart, successful and good-looking Iwaya Sumire works for a big newspaper. However, her boss asks her to leave for being too "perfect" a woman. Feeling angry and dejected Iwaya returns home depressed, and most of all lonely. However, when she finds an unconscious young man lying in a box out the front of her home and takes him in. He looks like a dog she used to own called Momo. She dub shim Momo and decides to "keep him as a pet." It's the start of an unexpected life together as they overcome obstacles and become quite attached to one another. But can love like this exist?