The story of when Agent Seo Soo Yeon, who returns from China, gets involved in a dangerous deal with Agent Jang Chun Woo.

Nobuko Shimura is on duty for the first time at Gyoda Hospital. The duty doctor is Yosuke Naoe. After 9pm, Jiro Toda, a childhood friend of Nobuko's, is brought in with a cut to his forehead from a fight. But Naoe has gone out for a drink, and can't be found. Both Toda and the ambulance crew become angry and demand to know where the doctor is. Naoe returns and seeing the commotion, he orders Toda be locked in a toilet until he calms down. Nobuko is horrified by Naoe' s attitude but is later impressed with his ability as a surgeon when treating Toda's injury. This is their first fateful meeting.

Single 33 year-old Go Byeong Hee works as a reporter for a sex magazine. She wants more romance and a more respectable life but isn't sure how to get it. 24-year-old Park Chul Su, mechanic and world traveler, is the younger brother of Byeong Hee's best friend. He's a free spirit and not concerned with what the world thinks. One night the two old family friends get drunk and wake up in bed together. Go Byeong Hee wants to forget it ever happened, especially since a good marriage prospect has just made an appearance. Unfortunately for her, Chul Su has other ideas....

Hakuro's father died when he was a child allowing his mother to re-marry into the wealthy Yagami family. Although Hakuro was also welcomed, he struggles to feel a part of this family. His younger half-brother, who possesses the same blood as him, has fared much better. After the death of his mother, Hakuro dropped the Yagami surname and parted ways with the family.

Hakuro, now a veterinarian, has a strong sense of justice, is sincere and has a weakness for beautiful women. One day, he is approached by such a woman, claiming she is the wife of his half-brother. She worriedly informs him that his half-brother has gone missing, leading the pair to team up and find his whereabouts.

In the process, Hakuro finds himself reluctantly embroiled in the Yagami family's battle over one sizeable inheritance. Could his half-brother's mysterious disappearance be connected?

Based on novel by Keigo Higashino.

Shin Ho Yoon is a powerful god in charge of determining human fate. His job in the celestial world is to write the destinies of mortals. But when he is charged with writing a romantic fate, he decides to steal ideas he reads in notes for a future screenplay authored by scriptwriter Go Chae Kyung. The latter is a drama series writer who pens outlandish and overly dramatic dramas. The tale Shin Ho Yoon concocts involves pairing Go Chae Kyung up with a near-perfect individual – a kind-hearted and ever-fortunate television producer named Jung Ba Reum. In his mortal guise, Shin Ho Yoon is Go Chae Kyung’s landlord, and from this position, he plans to help bring her together with Jung Ba Reum. But little by little, he finds himself developing feelings for her – a fact that threatens to derail his own carefully laid plans…

Boonparet, a young and eager attorney, is working on a case where he represents Pongdanai, his half brother, who is a playboy and a womanizer with many mistresses, including one of Boonparet’s best friends. Chisamai is an attorney trainee whom Pongdanai secretly likes, so she is assigned to handle the case, so they can be together more often. But, when she learns the truth about Pongdanai, she decides to work against him by representing Boonparet’s best friend to file for divorce.

Adapted from the novel "Dong Dok Mai" (ดงดอกไม้) by Nantana Weerachon (นันทนา วีระชน).

Honest Higurashi (Higura Shimasana, commonly known as Masa) is a former Yankee who has a legend of winning fights against 100 opponents, but now he runs a small izakaya "Paisen" near the sea.

With a big cut on his face is feared by the general public as a yakuza, but he is actually a kind-hearted young man who is gentle with wild animals and plants.

One day, he meets Kanakana, a girl who runs away from a suspicious man.

Kanakana has a mysterious power that can read people's hearts, and she was made to use that power in a gambling house by her uncle Sawada who knew it.

Adapted from a manga with the same title by Hiroyuki Nishimori.

Transfer student Jun Woo has no interest in school life, as he is traumatized from being expelled from bullying. Class president Hui Yeong greets Jun Woo warmly on his first day of school. Jun Woo rejects Hui Yeong’s kindness as Hui Yeong’s popularity and influence intimidate him.

When an incident breaks out, Jun Woo is falsely accused of stealing a watch. Everyone thinks Jun Woo is the culprit, and Hui Yeong uses his influence among his peers to fuel this rumor.

Meanwhile, Soo Bin has been watching Jun Woo all this time. She sees a different side to Jun Woo than the one that other people see, as she notices his cute, goofy streak and innocent smile. Everyone knows that Hui Yeong has a crush on her, but it’s the quiet and attentive Jun Woo that Soo Bin finds herself gravitating towards. Soo Bin’s warmth opens up the softest part of Jun Woo’s heart, and he decides to break out of his shell.

As the seasons change, will these youths also turn over a new leaf? "At Eighteen" captures the innocence of first love as these eighteen-year-old teens between immature and innocent.