Yumi’s Cells – Cast & Summary

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Yumi's Cells - Cast, Summary, Synopsis, OST, Episode, Review

A romantic and psychological Korean drama called Yumi’s Cells has just started its airing date on previous September 17, 2021, on tvN and TVING.

Yumi’s Cells is an adaptation of a webtoon with the same title, which is written by Lee Dong Gun from 2015 to 2020.

This drama is starred by Kim Go Eun, Ahn Bo Hyun, Lee Yu Bi, and Park Ji Hyun.

Kim Go Eun is popular with her main role for Goblin (2016) and The King: Eternal Monarch (2020), meanwhile Ahn Bo Hyun had starred in Dokgo Rewind (2017) and Kairos (2020).

Lee Yu Bi also once starred in Somehow 18 (2017) and A Poem A Day (2018).

The other main actress, Park Ji Hyun had become the main actress for Dear My Room (2018) and Do You Like Brahms? (2020).

Yumi’s Cells has its airing time on tvN and TVING every Friday and Saturday at 22:50 KST.

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Yumi's Cells – Cast & Summary


  • Title: Yumi’s Cells / 유미의 세포들
  • Also Known As: Yoo Mi’s Cells / Yumiui Sepodeul / Yumieui Sepodeul
  • Genre: Romantic Drama, Psychological Drama
  • Country: South Korea
  • Director: Lee Sang Yeob
  • Producer: Joo Moon Soo
  • Screenwriter: Lee Dong Gun (webcomic), Song Jae Jung, Kim Yoon Joo, Kim Kyung Ran
  • Production Companies: Studio Dragon, Studio N, Merrycow Creative, Locus Corporation
  • Network: tvN, TVING
  • Episodes:
  • Air Dates: September 17, 2021 –
  • Air Time: Friday and Saturday, 22:50 KST

Synopsis of Yumi’s Cells

This drama tells the ordinary daily life of Kim Yumi (Kim Go Eun).

In her daily life, she lives her life as a working woman. And also, she’s still single and doesn’t have any partner to accompany her days.

Also, Yumi feels hard to express herself, especially to express her own feelings.

Yumi then grows to be a person through a lot of work and romantic relationships. She also can find some happiness in her life.

Yumi also has brain cells that can express some emotions, like rationality, love, good, violence, and so on. But, these cells sometimes make her facing some troubles and emotions.

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Main Cast

Yumi's Cells – Cast & Summary , Synopsis, OST, Episode, Review

Kim Go Eun as Kim Yumi

A single working woman with an ordinary life. She learns about a lot of emotions day by day and grows like a real person.

Yumi's Cells – Cast & Summary  Synopsis, OST, Episode, Review

Ahn Bo Hyun as Ku Woong

He works his daily life as a game developer at his company.

Yumi's Cells - Cast, Summary, Synopsis, OST, Episode, Review

Lee Yu Bi as Ruby

She is the co-worker of Yumi. She has a cute and beautiful face, and always tells everyone that she’s a dating expert.

Yumi's Cells - Cast, Summary, Synopsis, OST, Episode, Review

Park Ji Hyun as Seo Sae Yi

Sae Yi is a colleague of Ku Woong at her company. She hustles to be the best art director in the game world.

Supporting Cast

Yumi’s cells

  • Love cell (voice: Ahn Soi)
  • Emotional Cell (voice: Park Ji Yoon)
  • Rational Cell (voice: Shim Kyu Hyuk)
  • Hungry Cell (voice: Lee Jang Won)
  • Naughty Cell (voice: Ahn Young Mi)
  • Detective Cell (voice: Jeong Jae Heon)
  • Fashion Cell (voice: Kim Yeon Woo)
  • Hysterious (voice: Um Sang Hyun)
  • Anxiety Cell (voice: Sa Moon Yeong)
  • Inner Feeling Cell (voice: Sa Moon Yeong)
  • Rampage Cell (voice: Jeong Jae Heon)
  • Fussy Cell (voice: Sa Moon Yeong)
  • Lullaby Cell (voice: Jeong Jae Heon)
  • Cheapskate Cell (voice: Ahn Soi)
  • Reaction Doll No.1 (voice: Ahn Soi)

Ku Woong’s cells

  • Rational Cell (voice: Um Sang Hyun)
  • Humor cell (voice: Jeong Jae Heoon)


  • Joo Jong Hyuk as Louis
  • Jung Soon Won as Chief Nam
  • Park Jin Young as Yoo Ba Bi/Bobby
  • Kim Cha Yoon as Bon Hee
  • Mi ram as Aida
  • Choi Minho as Wook, Yumi’s co-worker
  • Ahn Young Mi as Nung Cheol (Voice)
  • Lee Sang Yi

OST (Original Soundtrack)

  • If I Could Read Your Mind – Wendy (Red Velvet)
  • Nightfalling –  John Park

Trailer of Yumi’s Cells