What’s wrong with Secretary Kim is that the title sounds like a mystery, but the show is really a rom-com about why Kim Mi-so wants to quit her job and what happens next. The main cast is led by Park Seo-joon as Lee Young-joon and Park Min-young as Kim Mi-so, with Lee Tae-hwan , Kang Ki-young , Hwang Chan-sung , Pyo Ye-jin , Kim Ye-won , and Hwang Bo-ra in supporting roles.

Main cast

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<table>
  <tr><th>Actor</th><th>Role</th></tr>
  <tr><td>Park Seo-joon</td><td>Lee Young-joon / Lee Sung-hyeon</td></tr>
  <tr><td>Park Min-young</td><td>Kim Mi-so</td></tr>
  <tr><td>Lee Tae-hwan</td><td>Lee Sung-yeon</td></tr>
  <tr><td>Kang Ki-young</td><td>Park Yoo-sik</td></tr>
  <tr><td>Hwang Chan-sung</td><td>Go Gwi-nam</td></tr>
  <tr><td>Pyo Ye-jin</td><td>Kim Ji-a</td></tr>
  <tr><td>Kim Ye-won</td><td>Sul Ma-eum</td></tr>
  <tr><td>Hwang Bo-ra</td><td>Bong Se-ra</td></tr>
</table>

The series centers on a vice-chairman who tries to stop his longtime secretary from resigning after nine years of work.

Quick scoop

If you meant “what’s wrong” as in the plot hook, the whole point is that Mi- so’s resignation triggers the story, and the show slowly shifts from office comedy into romance. Some viewers also note the writing feels uneven at times, especially around character handling, but that is a review opinion rather than an official issue with the cast.

If you want

I can also give you:

  • the full cast list,
  • the character relationships, or
  • a spoiler-free recap of the drama.