Drama: Yumi’s Cells
Type: Drama
Format: Standard Series
Country: South Korea
Episodes: 14 + 14 + 8
Total Seasons: Season 1, Season 2, Season 3
Aired: Sep 17, 2021 – May 4, 2026
Aired On: Friday, Saturday, Monday
Genres: Comedy, Romance, Life, Drama
Duration: 1 hr. 10 min.
Content Rating: 15+ – Teens 15 or older
Synopsis
Yumi’s Cells is a heartwarming romantic drama that uniquely explores human emotions through the tiny cells living inside the mind of Kim Yu Mi. While Yu Mi appears to be an ordinary office worker, countless adorable cells control her emotions, decisions, fears, and dreams, making every moment of her life an unforgettable adventure.
In Season 1, Yu Mi struggles to recover from a painful breakup until she meets game developer Koo Ung. As their relationship blossoms, the viewers witness the hilarious and emotional journey of their hardworking love cells trying to keep romance alive.
In Season 2, after another emotional turning point, Yu Mi focuses on pursuing her dream of becoming a writer while beginning a new relationship with her charming co-worker Yoo Babi. As her career and personal life evolve, her cells face even greater emotional challenges and growth.
In Season 3, Yu Mi has matured into a successful novelist and enters another important chapter of her life with illustrator Sin Sun Rok. While balancing love, career, and self-discovery, her lively cells continue to guide her through happiness, heartbreak, and personal growth.
Filled with romance, comedy, emotional storytelling, and creative animated cell characters, Yumi’s Cells delivers one of the most unique and relatable love stories in Korean drama.
Cast
Season 1 – Main Roles
- Kim Go Eun as Kim Yu Mi
- Ahn Bo Hyun as Koo Ung
Season 1 – Support Roles
- Park Ji Hyun as Seo Sae I
- Lee Yoo Bi as Ruby
- Joo Jong Hyuk as Louis
- Jung Soon Won as Nam Ju Hyeok
- Park Jin Young as Yoo Ba Bi (Bobby)
- Mi Ram as Kang I Da
- Yoon Hyun Gil as Seo Yun U
Season 2 – Main Roles
- Kim Go Eun as Kim Yu Mi
- Park Jin Young as Yoo Babi
Season 2 – Support Roles
- Ahn Bo Hyun as Koo Ung
- Lee Yoo Bi as Ruby
- Mi Ram as Kang I Da
- Kwon Seung Woo as Kang Han Byeol
- Kim Cha Yoon as Lee Bonnie
- Jung Soon Won as Nam Ju Hyeok
- Joo Jong Hyuk as Louis
Season 3 – Main Roles
- Kim Go Eun as Kim Yu Mi
- Kim Jae Won as Sin Sun Rok
Season 3 – Support Roles
- Jeon Seok Ho as An Dae Yong
- Choi Daniel as Kim Ju Ho
- Cho Hye Jung as Baek Na Hui
- Mi Ram as Kang I Da
- Park Se In as Jang Su Hye
Notable Guest & Cameo Appearances
- Lee Sang Yi as Ji U Gi
- Kim Mi Soo as Ja Yeong
- P.O as Control Z
- Shin Ye Eun as Yoo Da Eun
- Ahn Bo Hyun as Koo Ung (Season 3)
- Park Jin Young as Yoo Ba Bi (Season 3)
- Hwang Chan Sung as Yun PD
- Lee Yoo Bi as Lee Ruby
Final Thoughts
Yumi’s Cells is one of the most creative and heartwarming Korean dramas ever produced. By combining live-action storytelling with charming animated cells, the series offers a fresh perspective on love, relationships, personal growth, and everyday emotions. Across three seasons, viewers witness Kim Yu Mi’s transformation from a heartbroken office worker into a confident writer who learns to love herself while navigating different relationships. With memorable performances, relatable storytelling, emotional depth, and lovable animated characters, Yumi’s Cells is a must-watch for fans of romance, comedy, and slice-of-life dramas.
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