Nanaoka is the team leader and director of the film crew at the struggling television station TV Nanaana. Based in Roppongi, he is one of three primary employees—alongside cameraman Nanamori and audio specialist Nanayama—who form the station's expedition team. His background is rooted in the station's financial troubles: after the administrative board cancels the network's most popular show for indecency, the crew is tasked with documenting the legendary rare animal known as the Kiina in the South American jungle of Ecuana to save the company from bankruptcy. Nanaoka's primary motivation is to keep the station afloat and preserve his job, driving him to accept this seemingly impossible assignment despite the station's lack of resources.

Personality-wise, Nanaoka is portrayed as a determined and resourceful leader, willing to brave remote and dangerous environments to secure a scoop. He works closely with Nanamori and Nanayama, forming a tight-knit team that relies on each member's specialty to overcome obstacles. His role in the story is that of the director and de facto captain of the expedition, making key decisions and coordinating the crew's efforts. Key relationships include his rivalry with the well-funded crew from Bubble TV, led by producer Zakibana, which adds a competitive edge to the hunt for the Kiina. Throughout the series, Nanaoka's development is shaped by the constant pressure to produce a hit program, leading him to adapt to unpredictable situations and demonstrate resilience. Notable abilities include his leadership skills, organizational know-how, and a knack for steering the crew through absurd and comedic challenges, though the series emphasizes his role as a determined everyman rather than any supernatural or specialized talent.