First, I should confirm if "Hadaka no Tenshi" is a known 1981 film. I can recall that "Naked Angel" is a real film from 1981 directed by Nobuhiko Obayashi. However, I'm not sure if there's any relation to OCR. It's possible the user is referring to a specific aspect of the film that involves OCR, but that's a stretch. Alternatively, "Okru" could be a typo for "Okru," a streaming service in some countries, but that might not be relevant. Another angle is that "upd" could be short for a patch or update to the film, like a remastered version. The user might be referring to a new release or restoration of the 1981 film titled "Hadaka no Tenshi."