Anticipation and excitement is on the rise as tvN's upcoming romantic comedy series "Romance Is a Supplement" (tentative title), starring Lee Jong Suk and Lee Na Young, dropped its first teaser posters.

Earlier this week, cable network tvN (via Soompi) has dropped two teaser posters for the upcoming "Romance Is a Supplement" - giving fans a first look at Lee Jong Suk and Lee Na Young's respective characters.

In one of the posters, Lee Jong Suk and Lee Na Young can be seen lying down on the ground, while being surrounded by books. It also comes with a caption that reads: "This is how their new chapter begins."

The story of "Romance Is a Supplement" revolves around the lives of employees who work at a publishing company. Lee Na Young ("Ruler of Your Own World" and "Ireland") plays a former rising star and a current unemployed divorcee, Kang Dan Yi, who joins the publishing company as a temporary worker.

Her life suddenly turns upside down when she comes across Cha Eun Ho (Lee Jong Suk), a brilliant writer who is also the company's youngest editor-in-chief. He has a warm heart and a reasonable personality.

Also starring in the upcoming tvN romantic comedy series are Kim Tae Woo ("Goodbye Mr. Black") as chief executive officer (CEO) Kim Jae Min, Jung Yoo Jin ("Moorim School") as Song Hae Rin, Wi Ha Joon ("Something in the Rain") as Ji Seo Joon, Park Gyu Young as Oh Ji Yool, Kim Yoo Mi ("Can We Fall in Love, Again?") as Go Yoo Sun, Kang Ki Doong as Park Hoon, Jo Han Chul as Bong Ji Hong and Kim Sun Young ("Legend of the Blue Sea") as Seo Young Ah.

"Romance Is a Supplement" marks Lee Na Young's small-screen comeback after a nine-year hiatus, as per The Korea Herald. She last appeared in the popular KBS 2TV drama, "The Fugitive: Plan B (2010)," alongside Rain (whose real name is Jung Ji Hoon), Daniel Henney, Lee Jung Jin, Song Jae Ho, Yoon Jin Seo, Sung Dong Il, and Yoon Son Ha.

As for Lee Jong Suk, the upcoming tvN series is his follow-up to 2017's romance fantasy series "While You Were Sleeping." It also marks his first romantic comedy ever since he officially debuted as an actor in 2010.

Helmed by director Lee Jeong Hyo, "Romance Is a Supplement" is set to premiere on Jan. 29, 2019 on the cable network tvN.