Hyperventilation

Two friends, Jung Jong-suk and Hwang Kyung-min, meet after several years and talk about their time in school, which left them scarred.

When a carefree woman learns that her closeted friend is gay, the two form an inseparable bond and find comfort in each other's company.

When they were young, Min-joo and Seo-yeon cared for each other and were closer than brothers and sisters. However, she accidentally learns about Seo-yeon's tutor, Woo-hyeon, and because of this man, their 10-year friendship starts to become shaky. Meanwhile, Jeong-soo is hurt in seeing Min-joo like that, and so he distanced himself from Min-joo. Because of Min-joo and Seo-yeon's misunderstanding, Jeong-soo who couldn't care much might just leave so Min-joo tries to break up with the help of Seo-yeon. While in the process of breaking up, Min-joo and Seo-yeon went back to their close relationship. The love of women who have been separated because of man, and the two men's friendship is comically drawn.

When filmmaker Young-soo introduces writer Soo-jung to his friend Jae-hoon, he unintentionally creates a love triangle. While Jae-hoon pursues Soo-jung, Young-soo clashes with his crew. Yet, just as the story appears to end, it starts all over again, this time with plenty of variations.

As the first snow falls in Seoul, two old friends reunite; one is a successful college professor, and the other, a struggling filmmaker recently returned from the United States. After their reminiscences, they finally decide to go in search of the young woman each had romanced years earlier.