Mr. Ōbayashi appears in the 1985 OVA as one of the human owners of Michael the cat. He features in domestic settings, reflecting typical pet-owner dynamics. One narrative segment shows Mr. Ōbayashi and his spouse confronting Michael's flea infestation, showcasing common challenges of cat ownership. Another sketch portrays the newlywed couple navigating the experience of welcoming their first pet, Michael, into their household.

The character operates exclusively within self-contained comedic vignettes. Official media adaptations document no overarching background story or character development for him. His role remains consistent as a supporting figure in scenarios emphasizing the humorous interactions between humans and their feline companions.