Unlike mainstream media, these works often use a first-person perspective where the listener is the protagonist.
Utilization of "dummy head" microphones (like the KU100) to create a 360-degree soundstage.
The alphanumeric code refers to a specific digital product ID, typically associated with Japanese adult media (often ASMR, voice works, or indie games) distributed on platforms like DLsite . The .rar extension indicates a compressed archive containing these digital files.