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Gyun-woo is having difficulty forgetting the sassy girl. He then reunites with his childhood sweetheart, an elementary school classmate from China who was often teased about her broken Korean. They marry despite family opposition, and Gyun-woo has no idea what marriage has in store for him.
A girl who loves swimming meets a boy with webbed feet and falls in love with him. Over time, the girl gets conflicted between cheering for the boy as a promising swimmer and keeping herself from an inferiority complex. Eventually, the girl breaks up with him and loses her chance at love.
Yu-na, a level-headed and rational insurance claim adjuster, investigates a questionable death by falling with suspicions of suicide. During her investigation, she meets Soon-kyu, the deceased's elusive guardian. As Yu-na probes further, she begins to question whether Soon-kyu is a mentor or a conman, and her carefully guarded inner world starts to shake.
Moon-jung is a caregiver who has a son in middle school. After getting divorced, she can't bear to bring him to her house, a plastic greenhouse she has converted into a home. She strives to raise the necessary funds to move into a real home for her and her son.
Hayoung, a successful dog trainer, is visited by her sister, Sora, who has a criminal record for murder. As Sora's bizarre behavior unsettles the training center and Hayoung's daily routine, buried truths and repressed desires start to rise to the surface.
Na-mi and Sun-woo, the outcasts in school, plan to commit suicide instead of going to the school trip. On the moment of success, they find out that the girl, Chae-lin, who made their lives miserable is living a new happy life in Seoul. So, they decide to make revenge before ending their lives. However, when they finally spot Chae-lin, they see a good-hearted girl in front of them which makes their plans go awry.
When Joong-pil, the biggest bully in his high-school by far finds himself harboring feelings for a classmate, his entire identity is thrown off balance. Suddenly his smoking, his drinking, his constant swearing and his habit of pushing underclassmen into walls don't seem like good habits anymore. Without his nastiness, who is he? He might just like this girl enough to find out, if he can figure out how.
High school student Yun-ji harbors a secret romance with her homeroom teacher, which results in a pregnancy. When the teacher abruptly disappears, Yun-ji decides to end the pregnancy. To buy illegal abortion pils, she leaves school early. Meanwhile, Kyung-sun discovers that her savings have vanished and sets out to track her down.
Young-jae, a teenager born from illegally sold sperm, goes to Chi-sung, a physician who had sold it when he was 20 years old. Young-jae demands a so-called ‘compensation for damages,’ claiming Chi-sung is responsible for his defects. Although at odds with Young-jae, Chi-sung slowly feels a connection to him. Later, Young-jae’s father Dong-suk appears and the three of them clash.
Ji-won, who had cut ties with everyone, takes a job at a factory that provides lodging and meals. She finds her roommate Ju-hee, a girl who dances the Tango all the time, both burdensome and intriguing. Ji-won gets involved in Hyun-woo's accident and feels uneasy as she watches Ju-hee try to take all the responsibility herself.