Five years into her marriage, Suzuka feels a growing distance between herself and her husband. What began as a loving relationship has cooled into routine indifference. He dismisses her desires, rejecting even her simple wish to own a dog, and the small frustrations of daily life accumulate into a quiet but persistent discontent. Suzuka finds herself yearning for something warm and obedient, something that will look at her with unconditional affection—a dog.

That void is filled unexpectedly when she meets Futa, a university student who appears in her life and begins to cling to her with an odd, puppy-like devotion. Bemused by his persistent friendliness, Suzuka finds herself thinking, I have found my dog. She decides to treat him as such, giving him a role that satisfies her unmet need for companionship and control.

But Futa is not a dog. He is a young man, and no matter how much Suzuka tries to treat him like a pet, the reality of their human connection complicates the arrangement. What starts as a playful fantasy of ownership begins to blur into something else, and both Suzuka and Futa find themselves navigating a relationship that is neither a conventional marriage nor a proper romance. As they spend more time together, the boundaries of what they are to each other shift, and the emotional and physical tension between them grows.

The story unfolds in a contemporary Japanese setting, moving between Suzuka's quiet home life and the everyday spaces where she and Futa meet. The narrative arcs follow the evolution of their unusual bond, from the initial humorous and awkward establishment of their pet-and-owner dynamic to the deeper, more complicated feelings that emerge as they continue the arrangement. Suzuka's growing attachment to Futa contrasts with her deteriorating marriage, while Futa's own motivations and desires become clearer over time. The series explores themes of loneliness, emotional neglect, and the search for intimacy in unconventional forms, balancing moments of comedy with more provocative and introspective scenes.