My Mister – Cast & Summary

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My Mister - Cast, Summary, Synopsis

The popular Korean drama called My Mister was aired starting from March 21 until May 17, 2018 on tvN.

Originally, the character Byeon Yo Soon was supposed to be played by Na Moon Hee, but the plan was declined because there was a scheduling issue before Ko Du Shim replaced his place.

The character Park Sang Hoon originally also was supposed to be played by Oh Dal Su, but the production team replaced him with Park Ho San because of the controversial issue.

But the main characters are still original, which is starred by Lee Sun Kyun as the male lead and IU as the female lead.

Lee Sun Kyun had magnetized the audience for her main roles in Miss Korea (2013) and My Wife’s Having an Affair This Week (2016).

IU also had starred in The Producers (2015), and Moon Lovers: Scarlet Heart Ryeo (2016).

My Mister was aired every Wednesday and Thursday at 21:30 KST and replaced the previous tvN drama, Mother.

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  • Title: My Mister / 나의 아저씨 / Naui Ajusshi
  • Also Known As: My Ahjusshi / My Ajusshi / My Ahjussi
  • Genre: Life, Drama, Family
  • Country: South Korea
  • Director: Kim Won Suk, Kim Sang Woo
  • Producer: Park Ji Hyun
  • Screenwriter: Park Hae Young
  • Production Companies: Chorokbaem Media, Studio Dragon
  • Network: tvN
  • Episodes: 16
  • Air Dates: March 21, 2018 – May 17, 2018
  • Air Time: Wednesday and Thursday, 21:30 KST
My Mister - Cast, Summary, Synopsis

Synopsis of My Mister

This drama tells a story about middle-aged men and strong woman’s life. The highlight of this story goes to Park Dong Hoon (Lee Sun Kyun) and Lee Ji An (IU).

Dong Hoon is a 40 years old man who has a wife, Yoon Hee (Lee Ji Ah). But in reality, his wife cheated on him and wants to propose a divorce to marry Joon Young (Kim Young Min).

On the other side, Dong Hun also has a family contains his mother and two brothers, Sang Hoon (Park Ho San) and Gi Hoon (Song Sae Byeok).

Both of her brothers are very different. Sang Hoon is jobless, meanwhile, Gi Hoon has a dream to be a film director.

Lee Ji An’s life is also not quite different. She has to take care of her grandmother, getting into debt, and get harassed by Gwang Il (Jang Ki Yong). She is a worker in the same company as Dong Hun’s company.

She sees that there’s an affair between her vice president in her company with Dong Hun’s wife and makes an offer to Dong Hun that might be beneficial for both of them.

Read more: Moon Lovers: Scarlet Heart Ryeo – Cast & Summary

Main Cast

My Mister - Cast, Summary, Synopsis

Lee Sun Kyun as Park Dong Hun

In his family, he is the second oldest son. His job is in the construction company.

He has a quiet personality but always wants to protect all the people he loves the most.

My Mister - Cast, Summary, Synopsis

IU as Lee Ji An

A strong woman who has been facing a lot of tough times. She knows Dong Hun’s weakness as one of her boss’ tasks but later, she falls in love with Dong Hun.

Park Ho San

Park Ho San  as Park Sang Hoon

One of Dong Hun’s brothers who has separated with his wife and doesn’t have a job.

Song Sae Byeok

Song Sae Byeok as Park Gi Hoon

One of Dong Hun’s brothers. He has a grand dream to be a film director.

Supporting Cast

Dong Hun’s family

  • Go Doo Shim as Byun Yo Soon
  • Lee Ji Ah as Kang Yoon Hee
  • Jung Young Joo as Jo Ae Ryun

Lee Ji An’s family

  • Son Sook as Lee Ji An’s deaf grandmother

People around Lee Ji An

  • Jang Ki Yong as Lee Kwang Il
  • Ahn Seung Gyun as Song Ki Bum
  • Lee Young Seok as Choon Dae: Kwang Il’s partner.

People in the company

  • Kim Young Min as Do Joon Young
  • Shin Goo as Chairman Jang Hoe Jang
  • Jung Jae Sung as Executive Director Yoon Sang Tae
  • Seo Hyun Woo as Head of Section Seo
  • Chae Dong Hyun as Kim Dae Ri
  • Kim Min Seok as Yeo Hyung Kyu
  • Ryu Sun Young as Jung Chae Ryung


  • Kwon Na Ra as Choi Yoo Ra
  • Park Hae Joon as Gyum Duk
  • Oh Na Ra as Jung Hee
  • Shin Dam Soo as Director Jung Chang Mo
  • Park Soo Young as Je Cheol

OST (Original Soundtrack)

  • That Man – Lee Hee Moon
  • Adult – Sondia
  • An Ordinary Day – Jung Seung Hwan
  • Dear Moon – Je Hwi
  • One Million Roses – Go Woo Rim
  • There Is A Rainbow – Vincent Blue
  • My Image Reflected In My Heart – Kwak Jin Eon
  • Forest – Ji Sun


  • 2019 55th Baeksang Arts Awards: Most Popular Actress – IU (My Mister)
  • 2019 55th Baeksang Arts Awards: Best Screenplay – Park Hae Young (My Mister)
  • 2019 55th Baeksang Arts Awards: Best Drama – My Mister
  • 2018 2nd The Seoul Awards: Grand Prize – My Mister
  • 2018 6th APAN Star Awards: Top Excellence Actress (Miniseries) – Lee Ji Eun (My Mister)
  • 2018 6th APAN Star Awards: Best Supporting Actor – Park Ho San (My Mister)
  • 2018 6th APAN Star Awards: Best New Actor – Jang Ki Yong (My Mister)
  • 2018 6th APAN Star Awards: Best Production Director – Kim Won Seok (My Mister)

Trailer of My Mister