The opening narration kicks off each episode, framing the series' events as grounded firmly in reality. It explicitly states the non-fiction nature of the journeys, rejecting fictional embellishment or dramatic contrivance. This establishes a documentary-like presentation of Hirohiko Yokomi and Naoe Kikuchi's railway travels.

By consistently underscoring the authenticity of the depicted experiences, the narration reinforces the core premise that these events occurred exactly as shown. It highlights Yokomi's meticulous itineraries and Kikuchi's initial train disinterest, establishing their dynamic. The narration maintains a uniform tone and purpose throughout all episodes, operating purely as an expository introduction without evolving as a character or developing narratively.

No expanded narrative function, character background, or additional role beyond this introductory capacity appears in any official media or manga sequels. The narration exists solely as a framing device for episode events, possessing no personal history or interactive presence within storylines. Its role remains strictly confined to establishing the series' foundational realism at the outset of each segment.