"Romance Is a Bonus Book" (Korean: 로맨스는 별책부록) is a 2019 South Korean TV show featuring Lee Na-young and Lee Jong-suk. It aired from January 26 to March 17, 2019, on tvN.

Synopsis

Cha Eun-ho is a successful writer and the main editor at a book publishing company. Kang Dan-i is a mother and a former advertising copywriter who had success in her career. When Cha Eun-ho was a child, Kang Dan-i saved him from an accident and got hurt in the process. While she was getting better in the hospital, she asked Cha Eun-ho to help her. Later, she stayed in bed for a year. By helping her find books to read from the library, Cha Eun-ho became interested in writing. The two young friends remained close throughout their childhood and into adulthood. However, their friendship had problems after Kang Dan-i began dating a man who was selfish and did not care about others. Although Cha Eun-ho did not approve of her choice, and Kang Dan-i sometimes had doubts, she decided to marry him.

In the present, Cha Eun-ho asks Kang Dan-i to help him find a housekeeper, but he does not know that she is the one working and being paid for it. Her husband cheated on her, and she is now divorced and without a job. Cha Eun-ho is unaware of her current situation or the difficulties she faces as a divorced mother with a long break from work. Eventually, Kang Dan-i can no longer keep her secrets, and Cha Eun-ho helps her. Their lives become more connected when Kang Dan-i applies for a temporary job at his publishing company. At first, Cha Eun-ho is worried about how she will do, but Kang Dan-i impresses him and other senior leaders with her creativity and hard work.

The rest of the story follows the personal and professional challenges they face as they slowly begin to understand their true feelings for each other and work through this new stage in their lives.

Cast

• Lee Na-young plays Kang Dan-i, a 37-year-old character.
• Lee Jong-suk plays Cha Eun-ho, a 32-year-old character.
• Jung Yoo-jin plays Song Hae-rin, a 29-year-old character.
• Wi Ha-joon plays Ji Seo-joon, a 29-year-old character.
• Kim Tae-woo plays CEO Kim Jae-min, who is very eager but has good intentions.
• Kim Yoo-mi plays Director Go Yoo-sun, who gives Kang Dan-i simple or routine jobs instead of letting her join the marketing team.
• Jo Han-chul plays Bong Ji-hong, who is married to Seo Young-ah.
• Kim Sun-young plays Seo Young-ah, the marketing team manager who is married to Bong Ji-hong.
• Kang Ki-doong plays Park Hoon, a new marketing team member who talks a lot and wants to please others.
• Park Gyu-young plays Oh Ji-yool, a new editorial team member who is not very deep and very spoiled, and has a very controlling mother.
• Lee Kwan-hoon plays Lee Seung-jin.
• Choi Seung-yoon plays Bae Kwang-soo.
• Lee Ha-eun plays Chae Song-ee.
• Lee Ji-ha plays Hae-rin’s mother.
• Oh Eui-shik plays Hong Dong-min, who was Kang Dan-i’s former husband.
• Lee Ji-won plays Hong Jae-hee.
• Hwang Se-on plays Kim Na-kyung.
• Noh Jong-hyun plays Oh Ji-yool’s former boyfriend.

Production

The first script reading event took place on October 26, 2018, with cast and crew members present.

This series represents Lee Na-young's return to television after a nine-year absence.

A press conference was held on January 21, 2019, to help promote the series, with lead cast members present.

Lee Jong-suk completed filming his parts for the series on February 27, 2019, because he had to enlist in the military on March 8.