Monmon furin: Oshiego wa yosojizuma.

Upon retiring from his teaching job, Osaki was presented with divorce papers by his wife. From then on, he spent his days going to pornographic movie theaters. One day, an out-of-place middle-aged woman entered the theater. She readily accepted the caresses of a drunken man and reached orgasm. The woman's face was that of his former student, Sakiko.