Shinji is a shut-in whose sole purpose in life is peeping through the window of the room across from his. The housewife living there is beautiful, and Shinji is obsessed with her defenseless, shaking ass whenever she changes clothes. Then, one day, Shinji realizes that she is Nao, a classmate he admired back in his student days... The thought that he had been peeping at his former classmate's naked body and private life only made Shinji's desires grow stronger. Just then, Shinji accidentally drops a shoe he was drying on his balcony. Nao picks it up and, completely unaware of his peeping, comes to visit his house...