Three nights before enlisting, Seung-wook decides to leave his mark since he can't avoid the military so he flirts with everyone. However, his school senior So-yoon nor his blind date Il-hong will fall for him. The night before he leaves for the army, Seung-wook decides he's going to see some action with the two girls. The project of 'leaving a mark' starts now.

Heon-sub is in his third year of cooking major at the Samjin University. He gets a job at the cooking school run by Jeong-min, who lectures at his school department. From a great looking professor to sexy students who have their eyes on young men, a married woman who tries hard to make things right in bed with her husband and the girl who dumped him right away at the blind date! Heon-sub is the only guy at the cooking club and his adult-rated eating fantasy begins.

A student finds his friend's mom very sexy. While studying for tests, she tempts him away from his studies and a hot affair ensues.

Chilsung School is for troubled kids. One day, a strange and bleak mood surrounds the school. The teachers turn into zombies. The kids must struggle to stay alive.

In a peaceful barbershop, a timid barber confronts a stranger who has started to send blackmail notes. Whenever the stranger comes to the barbershop, the amount of money he demands becomes greater and greater. Driven to desperation, the barber hires a detective, who discovers a shocking truth about the blackmailer.

Junho plans to give a present to his favorite female friend, Eunsu. However, Junho's plan failed due to Hyungtae's advancement towards Eunsu. This has prompted Junho to go to a shopping mall, where Eunsu's favorite singer holds a fan meeting. The kids meet together and disturbed the shopping mall. A security guard eventually catches them. On the other hand, the robbers are planning to take over the shopping mall. It is up to the kids to defeat the robber.

Family go on a picnic after a long time. But It's not all fun.

February 2028. Seok-goo, an old bachelor running a photo studio, while spending his free time was asked by a young lady for help as if she is being chased by a gangster. She is the daughter of a big time gangster. Her father's rebellious subordinates killed his father for his wealth. If Seok-goo helps her, she will give him a small amount of money everyday. No matter how much he looks at it, Eun-sook's identity is suspicious, and to Seok-goo, unimaginable things starts to happen.

Joon-hyeok is preparing to pass the exam for 9th rank government worker. Since it is his third attempt, he must pass the exam for sure this time. He becomes to live in a boarding house, which is a part of his father’s extraordinary measures to help his son studying. But what has been waiting for Joon-hyeok in the luxurious house was not the thick text books, but the two free-spirited women. Joon-hyeok begins his cohabitation with Ah-jeong, the owner of the boarding house, who is full of voluptuous beauty, and Dal-lae, a nurse, who exudes sex appeal from both her face and body. Since then, Joon-hyeok starts to spend every night to study women not his books.

Bomi is a friendly broadcasting writer. She has a boyfriend named Jeong-nam who just graduated from law school, but they're not on very good terms right now. Their sex isn't fun either. Then one day, Bomi's friend suggests she joins the adult version of "Pairs" and starts having affairs with different people. Man 1,2 and 3 and woman 1,2 and 3 check each other out but jealousy gets the best of them and they step over the line.