Smile Again (2010)

A wealthy business heir marries an ordinary office worker after they have a one-night stand that leads to her unexpectedly becoming pregnant.

Gong Woo-Jin is a 30-year-old single man and he works as a set designer. Due to a trauma he experienced 13 years ago, he does not want to have a relationship with others. When Woo Seo-Ri was 17, she fell into a coma. 13 years later, she wakes up from her coma. Her mental age is still that of a 17-year-old, but she is now 30-years-old. Gong Woo-Jin and Woo Seo-Ri get involved with each other and fall in love.

Yoo Eun-ho, a single dad armed with perfection, becomes the secretary of Kang Ji-yun, the CEO of a popular headhunter company, who doesn't do anything except work.

Han Kyul gives his family's café a new spin, hiring only good-looking men to work there -- plus an androgynous-looking girl he mistakes for a man.

In the near future, Sophie tells her son the story of how she met his father: a story that catapults us back to the year 2021 where Sophie and her close-knit group of friends are in the midst of figuring out who they are, what they want out of life, and how to fall in love in the age of dating apps and limitless options.

A romance takes place between Kang Ji-Sung aka Louie and Ko Bok-Sil. Louie is from a rich family, but he has lost his memory. Ko Bok-Sil is a woman with a heart like an angel. Louie learns about true love after meeting Ko Bok-Sil.

Since he lost his hearing, Cha Jin-woo has gotten used to his solitary life. One day, an aspiring actress Jung Mo-eun, enters his quiet daily routine.

Jin-ho Jeon is a very stylish young man with the perfect looks. Jin-ho has also some faults which include being self-centered and obsession with cleanliness. Jin-ho Jeon then comes across Gae-in Park, a woman hurt by love and is now looking for a gay roommate/friend. Jin-ho wanting to live with the woman, then pretends to be a gay male.

Medical school student, Chang Min, and a dietitian, Jin Hee, fall in love and marry despite his family's strong opposition. When Chang Min marries Jin Hee, he gives up his medical internship to become a pharmaceutical salesman despite the fact that the rest of his family are successful doctors. Their married life is miserable as Chang Min's family looks down on Jin Hee and Chang Min begins to treat her poorly. They finally divorce and go their separate ways until they are suddenly reunited as interns working at the same hospital. Will this couple's tumultuous feelings for each other be rekindled?

Song Ju and Jeong Seo who have lost a father and a mother respectively spend their childhood together like real siblings. Song Ju is there for Jeong Seo whenever she feels lonely and has a hard time, and Jeong Seo also relies a lot on Song Ju. However, after Jeong Seo's father gets married to Tae Mi Ra, Mi Ra and her daughter Yu Ri keep harassing Jeong Seo out of jealousy. Tae Hwa, Yu Ri's rough and wild older brother, has a crush on Jeong Seo who is pure and kind unlike him.