The popular K-drama Yumi’s Cells is coming back for Season 3 in 2026, and fans are excited to see Kim Go Eun reprise her role as Yumi, now a successful romance novelist. The new season introduces Kim Jae Won as Soon Rok, a logical yet charming editor who shakes up Yumi’s quiet life. Along with returning favorites, fresh faces like Choi Daniel join the cast, bringing new energy to the beloved series.
Yumi’s Cells Season 3 Plot And New Developments
Yumi’s Cells follows the life of an ordinary woman, Kim Yumi, through the perspective of her brain cells, which control her thoughts and emotions. In Season 3, Yumi has achieved her dream of becoming a bestselling romance writer, but her love life remains complicated. Her cell village, once lively, has gone quiet—until Soon Rok enters the picture.
Kim Jae Won’s character, Soon Rok, is a new producer at Julie Publishing, where Yumi works. He is calm, rational, and unexpectedly blunt, which clashes with Yumi’s emotional nature. Their professional relationship soon leads to personal sparks, waking up Yumi’s dormant love cells.
“It feels new to be joining a project that has received so much love. I will do my very best to create a wonderful Soon Rok in this series as well. I would be grateful for your continued support and love.” — Kim Jae Won
Returning And New Cast Members
Fans will see familiar faces alongside new additions in Season 3:
- Kim Go Eun returns as Yumi, now a successful author navigating love and career.
- Kim Jae Won joins as Soon Rok, a logical editor who disrupts Yumi’s routine.
- Jeon Suk Ho reprises his role as Ahn Dae Yong, Yumi’s supportive editor-in-chief.
- Mi Ram is back as Yi Da, Yumi’s close friend.
- Choi Daniel debuts as Kim Ju Ho, a bestselling extroverted writer, a new character not in the original webtoon.
- Jo Hye Jung plays Baek Na Hee, Yumi’s cheerful assistant writer.
- Park Se In joins as PD Jang, a producer working with Yumi.
Special cameos include Sung Ji Ru as Yumi’s loving father and Lee Yu Bi as Ruby, her mischievous former colleague.
Fan Reactions And Expectations
Since the announcement, fans have shared mixed reactions about the new casting, especially Kim Jae Won’s role as Yumi’s potential love interest. Some are excited, while others remain cautious, given Yumi’s past romantic struggles.
“I can’t wait to see Kim Go Eun and Kim Jae Won’s chemistry! Season 3 is going to be amazing.” — Fan comment on Twitter
“I hope this time Yumi finds lasting love. She deserves happiness!” — Netizen reaction
Release Date And Where To Watch
Yumi’s Cells Season 3 is set to premiere in the first half of 2026 on TVING. While an exact date hasn’t been confirmed, filming is already underway. Fans can revisit Seasons 1 and 2 on streaming platforms like Viki to refresh their memories before the new season arrives.
Credits: TVING, Sports Seoul
