Recorded using a high-quality binaural microphone (often a KU100) to create a 3D soundstage, making it feel as though the character is speaking directly into the listener's ears. Usage and File Info

どきどきメモリアル (Dokidoki Memorial) Genre: ASMR / Voice Drama Release Date: June 10, 2022 Content Summary

The "RJ390136.mp3" file you have is likely a specific track or the full combined audio from this release. Because these files are often shared or archived under their DLsite ID, the code serves as the primary way for listeners to identify the specific voice actress and circle involved.

Discipline, "Wakarase" (making someone "understand" or submit), and heavy use of binaural sound effects.