He looks like he’d hold the door open for you. He’d also tell you your manuscript is terrible. Meet Soon Rok — Yumi’s most unpredictable love interest yet.
Yumi’s Cells has always been a drama that understands the beautifully messy reality of human emotions. Season 3 is about to crank that energy up to a whole new level, and Kim Jae Won just gave fans the most delicious preview of what’s in store when his character Soon Rok walks into Yumi’s life.
Yumi’s Cells 3 — Overview
| Detail | Info |
|---|---|
| Drama | Yumi’s Cells 3 |
| Based On | Popular webtoon of the same name |
| Lead Actress | Kim Go Eun (as Yumi) |
| New Cast Member | Kim Jae Won (as Soon Rok) |
| Soon Rok’s Job | Editorial PD at Julie Publishing |
| Romance Type | Love-Hate Romance |
| Premiere Date | April 13, 2026 — 6:00 PM KST |
| Streaming | Viki |
Who Is Soon Rok — And Why Is He So Intriguing?
In Season 3, Kim Jae Won joins the cast as Yumi’s new love interest Soon Rok — an editorial PD at Julie Publishing who, in contrast to his deceptively sweet face, is merciless when delivering brutally honest facts with zero sugarcoating.
That contrast alone is irresistible. A man who looks gentle but pulls absolutely no punches? Yumi’s Cells fans know exactly how chaotic that energy is going to be for Kim Go Eun’s lovable protagonist.
At work, the perfectionist Soon Rok is the epitome of polished professionalism — but he’s actually a total homebody who is only truly himself when relaxed at home, with his cells operating in low-power mode whenever he steps outside.
The “on-off” duality here is pure K-drama gold — and Kim Jae Won clearly understood the assignment.
What Kim Jae Won Said About the Role
“Because I was a fan of the original webtoon and also the drama adaptation, I was so excited to be part of Season 3,” said Kim Jae Won. “I fell in love with the unique way this drama makes your heart flutter, as well as the unexpected duality of Soon Rok’s ‘on-off’ charms.” soompi
He added that Yumi’s Cells is a drama where viewers become the cells as they follow along with Yumi’s emotions — and that many unexpected incidents will unfold as Yumi meets Soon Rok this season.
This is exactly the kind of casting that gets fans genuinely invested before a single episode airs.
Why Yumi’s Cells 3 Is One to Watch
Based on a beloved webtoon that captivated millions of readers, Yumi’s Cells has perfected the art of making everyday emotions feel extraordinary — and Season 3’s fresh love-hate dynamic promises to be its most emotionally complex chapter yet.
For all the latest Yumi’s Cells 3 updates, cast interviews, and K-drama premiere dates, head over to TechnoSports’ K-drama hub — your go-to source for everything Korean entertainment.
