Kyûkyoku onanii: Okumade marumie (1991)

Synopsis

Reiko, a female college student, was looking outside with her newly purchased telescope. She bought it impulsively, but since she had no intention of using it, she looked around the neighborhood. Then she saw a young man caressing the exposed lower half of a woman... And a suspicious middle-aged man wandering around. Reiko was surprised by the sudden sight...