JAV Tokyo

My sister, who had temporarily returned to Japan for a medical checkup after studying abroad, asked her brother, a medical student, to do a simple health check... He put a stethoscope on her chest and tilted his head. She apparently confirmed multiple heartbeats... Moreover, the heartbeats were completely different from human heartbeats... In order to confirm the abnormality, the older brother palpated her... However, he could not find the cause at all....