Because a piece of mail belonging to her neighbor Hosoda was mistakenly delivered to the Omi household, Rika went to deliver it in person. When Hosoda answered the door shirtless, she was so surprised that she couldn't look him in the eye. After returning home, her body throbbed from seeing a man's naked torso for the first time in a long while, and she began comforting herself alone with a toy. She had no idea that she was being watched from the window... A few days later, Hosoda visited Rika with a gift to thank her for the mail, and revealed that he had seen her masturbating. After Hosoda left, when she went to close the window, Hosoda was in the opposite window showing off his erect cock... Seeing this, Rika instinctively reached down to her own crotch—