The Secret Romantic Guesthouse

The Secret Romantic Guesthouse is a 2023 South Korean television series starring Shin Ye-eun, Ryeoun, Jung Gun-joo, and Kang Hoon. It premiered on SBS TV from March 20 to May 16, 2023 and aired every Monday and Tuesday at 22:00 (KST). It is also available for streaming on Wavve in South Korea, and on Viki and Viu in selected regions.

Synopsis
The series is about an incident that takes place when the owners of a guesthouse called Ihwawon Inn, which breaks stereotypes, and boarders with secrets gather to find Lee Seol who disappeared 13 years ago.

Main

 * Shin Ye-eun as Yoon Dan-oh: the owner of a guesthouse called Ihwawon Inn. She is a livelihood mistress of the Joseon Dynasty, and draws the attention of flower scholars and viewers by portraying a lovely and confident character.
 * Ryeoun as Kang San: a student preparing for a martial arts program with a cold atmosphere.
 * Jung Gun-joo as Jung Yu-ha: a noble scholar who has a delicate personality that takes good care of the other person's feelings and fancy Dan-oh.
 * Kang Hoon as Kim Shi-yeol: Dan-oh's best friend and always quarrels with her, but even gives her dating advice.

People at Ihwawon Inn

 * Lee Mi-do as Najubeak: Dan-oh's nanny.
 * In Gyo-jin as Yook Ho: the oldest boarder in Ihwawon Inn.
 * Jo Hye-joo as Yoon Hong-joo: Dan-oh's older sister.

People at Buyeonggak

 * Han Chae-ah as Hwa-ryeong: a gisaeng who runs Buyeonggak, the largest guest house in Hanyang.
 * Hwang Bo-reum-byeol as Ban-ya: Jang Tae-hwa's confidant.

People in the government

 * Oh Man-seok as Jang Tae-hwa: a judge of Hanseongbu and an influential figure of Buyeonggak.
 * Ahn Nae-sang as Shin Won-ho: the Left State Councilor.
 * Hyun Woo as Lee Chang: king of Joseon.
 * Kwon Do-hyung as Jang Hyeon: Jang Tae-hwa's son.
 * Song Ji-hyeok as Choi Jong-soo: Jang Tae-hwa's right-hand man.
 * Kim Hyun-sik as Kim Moo-hyung: Jang Tae-hwa's right-hand man.

People in the palace

 * Gil Eun-hye as Gwiin Park: Lee Chang's concubine.
 * Nam Gi-ae as Queen Dowager: Lee Chang's mother.
 * Lee Joon-hyuk as Noh Seong-gil: the king's chief eunuch.
 * Joo Suk-tae as Kim Hwan: the only person Lee Chang believes in.
 * Choi Tae-hwan as Yoon Gu-nam: the king's royal guard.

Extended

 * Lee Kwan-hoon as Park Jong-gwan: a military leader in the Naegeumwi.

Special appearances

 * Han Eun-seong as Jung Gil-joon
 * Park Hwi-soon as Ong Saeng-won

Development
On August 30, 2022, Pan Entertainment announced that it had signed a contract with SBS drama division—Studio S, to produce and supply The Secret Romantic Guesthouse worth 13 billion won. The drama will be produced in cooperation with Apollo Pictures.

Casting
On September 14, 2022, the main cast lineup was confirmed.