Chiharu attends a university in Tokyo. Her studies are going well, and she has a good relationship with her family. She lives a fulfilling life. Chiharu has a reclusive brother who secretly watches Chiharu with a hidden camera. He uses her knee-high socks and underwear as a masturbation aid so that Chiharu doesn't find out, but his twisted desires grow and grow, and he finally gives Chiharu a sleeping pill...