refers to a specific entry in a Japanese adult media series rather than a traditional "useful story" or a news report. In the context of this type of media:
If you were looking for a story with a different kind of "usefulness"—such as a moral lesson, a historical account, or a guide on rail safety—this particular title would not be the correct source. IRO-015 Married Molester Train - Touch The Age...
The title you referenced, IRO-015 Married Molester Train - Touch The Age refers to a specific entry in a Japanese
: These stories are fictional, scripted adult dramas. They typically revolve around a specific trope—in this case, non-consensual or "chikan" (groping) fantasies involving married characters on public transportation. They typically revolve around a specific trope—in this
: These are produced for entertainment within the adult industry and do not depict real-life events or offer practical life advice.
: This is a production code used by a specific studio to identify the release in their catalog. Thematic Content