Returning the favor of the dog immerses users in a heart-wrenching scenario where they encounter a dog in need of help at a sanctuary on a windy day. Sympathizing with the fate of the animal, the main character decides to provide him with a warm home and care. However, the plot takes an unexpected turn when the rescued dog, affectionately named Chill, undergoes a transformation, turning into a humanoid figure with fanged ears – the Dog-Eared Girl. Communication with Chill is limited at first due to her rudimentary language skills.

However, through shared experience and interaction, gamers witness amazing development as the girl gradually learns to express her thoughts and feelings more effectively. This development serves as an important element of the narrative, deepening the emotional connection between the user and the character. A significant aspect of Returning the favor of the dog's gameplay involves nurturing a bond with Chill. By investing time and effort into her well-being, gamers watch their relationship build. Depending on the choice and joint activities, a girl’s personality can develop in different directions. She can be a skillful companion in the kitchen, helping with cooking, or exhibit traits that reflect a more sensual and gentle nature. The title's setting cleverly explores themes of camaraderie, empathy, and personal growth.