An Empty Dream, Chunmong, 춘몽 (1965) dir. Yoo Hyun mok

A young man and a woman come to know each other while at the dentists s office. They are put under anesthesia and in the unconsciousness they fall in a love triangle with the dentist as if in a dream. In the extremity of happiness and misfortune, they experience the transcendence of time and space and are able to fulfill their lust. As a result, the affair is completely ruined. Wailing in great regret, they at last come to consciousness and reality.