『バランスボール・ガールズ #2』("Balance Ball Girls #2") 椎名香奈江 青山ひかる 上村みやび

A low-angle shot of a girl sitting on a balance ball violently vibrating up and down. In addition, when the girl lies on her back on a balance ball and arches her body, the camera zooms in on her lower body, and other exciting scenes occur one after another.