Seok Rae-myeong

Two school troublemakers decide to become better students. They visit their suspicious teacher everyday after school to ask questions and offer help. When their teacher falls ill due to overwork and is hospitalized, they decide they must find a way to show their appreciation.

Dong Won is a down-and-out artist who suffers from despair and dissatisfaction and suicidal tendencies. During a trip to Sorak mountain, he tries to kill himself. He falls in love with Sun Hee, the cabin owner's daughter. For a short time, he experiences true love. But they break up because of Sun Hee's mother. Dong Won becomes a fork crane driver but cannot escape his unhappiness. One day, he travels to Sorak mountain and meets Sun Hee and their son.

After coincidentally witnessing a boy jumping from the rooftop due to pressures of the college entrance exam, our heroes conceive an idea for a learning device that works while you sleep. Dong-gi, Ho-tae, and Jae-ha go to Chairman Kim of an electronics company to get the funds to make it. They experiment the 'snooze machine' on their younger brother, Dong-seok. Once at the bottom of the class, Dong-seok goes to the top but he is ostracized by his classmates. They reject the snooze machine and shout, 'Let us live like human beings!' Ho-tae gets into an argument with the other two over the development of the snooze machine. He moves out but later is persuaded back by the great burst of laughter stemming from solid friendship. Arm in arm, the three face a brighter tomorrow together.

Nicknamed Yalkae, notorious high school prankster Du Su (Lee Seung Hyun) is always up to no good with his buddy Yong Ho (Jin Woo Young). Both of them have been held back a year, but instead of studying they continue to cause trouble for their teachers and classmates. Du Su gleefully pulls a prank on his tattling classmate Ho Cheol, but he has a change of heart when he finds out Ho Cheol gets injured as a result.

Ho Tae joins in Dong Ki's plan for a futuristic car but worries about how to fund the project. A businessman recognizes the spirit of these two and helps them. Through Jae Ha's introduction, Ho Tae and Dong Ki meet Old Man Hwang whose experience helps them make the futuristic car. And so begins the schemes of the leading car companies to win them over. Through many twists and turns, they develop the futuristic car. But then they find out that their invention may break social stability.

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