What’s Wrong with Secretary Kim stars Park Seo-joon as Lee Young-joon and Park Min-young as Kim Mi-so, with Lee Tae-hwan , Kang Ki-young , Pyo Ye-jin , Kim Ye-won , and Hwang Chan-sung among the supporting cast. It’s a 2018 South Korean romantic comedy series that aired on tvN for 16 episodes.

Main cast

Actor Role
Park Seo-joon Lee Young-joon / Lee Sung-hyeon
Park Min-young Kim Mi-so
Lee Tae-hwan Lee Sung-yeon / Lee Seong-hyeon
Kang Ki-young Park Yoo-sik
Pyo Ye-jin Kim Ji-a
Kim Ye-won Sul Ma-eum
Hwang Chan-sung Go Gwi-nam

Supporting names

The broader cast also includes Kim Hye-ok , Kim Byung-ok , Hwang Bo- ra , Jo Deok-hyun , and Moon Woo-jin in younger versions of key characters.

Context

The series is based on a novel by Jung Kyung-yoon and later adapted into a webtoon before becoming the TV drama. It remains one of the most recognizable K-drama rom-coms from 2018.

Note

There’s also some online chatter about a supposed “Season 2” in 2025, but that appears to be fan/video speculation rather than confirmed official casting information.