[kusuguruman-0012]

Director Nagakusuguru Man of the Female Body Research Institute: Observational Experiment on Cosplaying Big-Titted Girls' Heartbeats, Stomach Noises, and Body Temperature Who's the JAV actress in this video? Amateur? Name revealed!

Satsuki, either G-cup or H-cup. While her large breasts seemed like they might interfere with recording heartbeat sounds, in practice this turned out to be the most successful recording we've ever done. Swallowing sounds were also captured with exceptional clarity. Although an unexpected error occurred during the breast-rubbing heat increase experiment, all other scenes achieved extremely high-quality audio. This release also includes multiple alternate-angle versions of the same scenes, offering new discoveries with every viewing. Additionally, the interview segment was shot simultaneously with another production, adding further depth and richness to the overall experience.