Yumi's Cells Season 3 is the third installment of the live-action × animation rom-com in which cells in the heroine's head drive her emotions. It aired on TVING and tvN in April–May 2026 and streams exclusively on Disney+ (from April 13, 2026; all 8 episodes). Kim Go-eun returns as Yumi, now a successful author, with Kim Jae-won as her new love interest.
📺 Series Info
| 🎬 Title | Yumi's Cells Season 3 (유미의 세포들3) — Japanese title: ユミの細胞たち シーズン3 |
| 📅 Broadcast | From April 13, 2026 (Mondays, TVING / tvN); ended in early May (sources say May 4 or 5) |
| 🎞️ Episodes | 8 (season 3) |
| 🎥 Director | Lee Sang-yeop (returning from seasons 1 and 2) |
| ✍️ Writers | Song Jae-jung, Kim Kyung-ran |
| 📖 Source | A popular webtoon with more than 3 billion views |
| 📱 Streaming in Japan | Disney+ (Star) — exclusive |
📖 Plot (no spoilers)
Three years after the last season, Yumi has realized her dream of becoming a romance novelist. After four hit books she is a popular author — but in the middle of a satisfying life, she falls into a slump.
Then a rule-breaking new editor, Shin Seung-rok, appears. Emotions she had forgotten, like anger, start to stir again, and her "cell village" gets lively. After a surprising spark on a business trip, will their relationship fall apart, or will a new romance begin?
🔁 Seasons 1 and 2
Yumi's romances were with Goo Woong (Ahn Bo-hyun) in season 1 and Yoo Babi (Jinyoung) in season 2. Season 3 picks up with Yumi as a successful author. When season 3 began, Disney+ also released seasons 1 and 2 in full.
🎭 Cast
Kim Go-eun as Yumi — the lead since season 1; now a popular author finding a new love.
Kim Jae-won as Shin Seung-rok — Yumi's new love interest, introduced in season 3. Disney+ describes him as a rule-breaking new editor, while other media call him a producer.
Other cast
- Jung Seok-ho, Choi Daniel, Jo Hye-jung, Miram and Park Se-in
- Special appearances: Son Jil, Yoon Yu-sun and Lee Yu-bi
Role-name spellings differ between media; we list what we could confirm.
📱 Where to Watch
| Disney+ (Star) | Exclusive streaming from April 13, 2026; all 8 episodes available |
| Seasons 1–2 | Also on Disney+ |
❓ Frequently Asked Questions
How many episodes does Yumi's Cells Season 3 have?
8 episodes.
Where can I watch Yumi's Cells Season 3?
On Disney+ (Star), exclusively in Japan. Seasons 1 and 2 are also available there.
Do I need to watch seasons 1 and 2 first?
You can start from season 3, but seasons 1 and 2 help you enjoy Yumi's past romances and the cells' relationships.
Who stars in Yumi's Cells Season 3?
Kim Go-eun (Yumi) and Kim Jae-won (Shin Seung-rok).
Is Yumi's Cells based on a webtoon?
Yes — on a popular webtoon with more than 3 billion views.
Who made Yumi's Cells Season 3?
Directed by Lee Sang-yeop, written by Song Jae-jung and Kim Kyung-ran.
What is the ending of season 3?
We do not give away the ending in this article — see it for yourself.
🔥 Soonho's Take
A warm series where the cells in Yumi's head explain love and work. It is also a good excuse to rewatch from season 1.
🔗 Sources
・Disney+ Navi – Yumi's Cells Season 3 / Navicon News – series information (Japanese)
Based on public information as of November 2026. Role-name spellings and broadcast dates may differ between sources.