In Your Radiant Season (2026) official poster
📺 K-Drama Guide · Romance · Mystery

In Your Radiant Season

찬란한 너의 계절에 · 2026
✅ Completed · 12 eps
🎬 Disney+ · Hulu
⭐ 8.3 / 10 MDL
🔞 15+
⚡ Updated · Apr 06, 2026

📋 Drama Overview

Everything you need to know before you hit play.

In Your Radiant Season (2026) official poster
Completed
🔥 2026 Romance Pick
In Your Radiant Season
찬란한 너의 계절에 (Chanranhan Neoui Gyejeole) · 2026 · South Korea
WriterJo Sung-hee
DirectorJeong Sang-hee, Kim Young-jae
Episodes12 eps · ~70 min each
⏱️ Binge Time14h 0m
AiredFeb 20 – Apr 3, 2026
GenreRomance · Mystery · Drama
Content Rating15+ · Teen & Up

Disney+
Hulu
Wavve
MBC
Healing Romance
Memory Loss
Slow Burn
Fashion Designer
Grief

Song Ha-ran (Lee Sung-kyung) is exactly what she looks like from the outside: polished, composed, the head designer of Korea’s most prestigious fashion house. But the composure is a shell. Seven years ago, a lab explosion in Boston took the person she loved, and Ha-ran has been stuck in that winter ever since — functional, successful, and quietly frozen.

Seonu Chan (Chae Jong-hyeop) arrives like the title promises: bright, relentlessly cheerful, the kind of person who insists on gifting people spring. He works as a character designer at a world-renowned animation studio and wears his warmth like armor — because underneath it, he’s carrying his own damage from that same Boston accident. When they collide, neither one is ready for what the other is about to unbury.

Episode Progress
12 / 12 ✅ Completed

▶ Official Trailer

🎭 Cast & Characters

Six performances that carry this story — from the woman frozen in grief to the man who refuses to let winter last forever.

Lee Sung-kyung as Song Ha-ran in In Your Radiant Season (2026)
Lee Sung-kyung
Song Ha-ran

Lead

Chae Jong-hyeop as Seonu Chan in In Your Radiant Season (2026)
Chae Jong-hyeop
Seonu Chan

Lead

Han Ji-hyun as Song Ha-young in In Your Radiant Season (2026)
Han Ji-hyun
Song Ha-young

Supporting

Lee Mi-sook as Kim Na-na in In Your Radiant Season (2026)
Lee Mi-sook
Kim Na-na

Supporting

Kang Seok-woo as Park Man-jae in In Your Radiant Season (2026)
Kang Seok-woo
Park Man-jae

Supporting

Oh Ye-ju as Song Ha-dam in In Your Radiant Season (2026)
Oh Ye-ju
Song Ha-dam

Supporting

🍿 Where to Watch

Stream In Your Radiant Season on these platforms.

📺 Episode Guide

Spoiler-light recaps — enough to remember where you left off, nothing that ruins the ride.

In Your Radiant Season Episode 1 — Seven Years Later
EP 01
Seven Years Later
February 20, 2026
A lab explosion in Boston, seven years erased, and one unexpected reunion at a Korean fashion house. The show establishes its central gap immediately: Chan recognizes Ha-ran; she doesn’t know him at all. Lee Sung-kyung carries the early stillness beautifully — Ha-ran’s composure isn’t cold, it’s exhausted. The final minutes make the mystery’s shape clear without giving anything away.

In Your Radiant Season Episode 2 — The Three-Month Offer
EP 02
The Three-Month Offer
February 21, 2026
Chan makes his move: a three-month trial friendship, nothing more. It’s an odd, slightly absurd proposal — and Chae Jong-hyeop plays it with just enough sincerity to make it land. Ha-ran’s younger sister Ha-young enters properly here, and Han Ji-hyun immediately steals every scene she’s in. The show finds its rhythm.

In Your Radiant Season Episode 3 — Undeterred
EP 03
Undeterred
February 27, 2026
Ha-ran says no to the friendship offer; Chan hears it as a maybe. The episode is carried almost entirely on the slow crack forming in Ha-ran’s defenses — Lee Sung-kyung is precise about when to let it show and when to snap it shut. The three-sister dynamic deepens, and the show makes clear it’s just as interested in the family story as the romance.

In Your Radiant Season Episode 4 — The Sound in His Head
EP 04
The Sound in His Head
February 28, 2026
The closer Chan gets to Ha-ran, the louder the noise in his head becomes. The episode begins layering the medical tension under the warmth — Chan’s hearing loss and fragmented memory are no longer just backstory. Chae Jong-hyeop is most compelling when playing someone trying very hard to seem fine. The audience starts to understand what he might be hiding.

In Your Radiant Season Episode 5 — Gyeongju
EP 05
Gyeongju
March 6, 2026
The drama’s best episode in the first half. The Gyeongju trip unlocks something in Chan — a lost memory surfaces, and the easy warmth of the previous episodes cracks into something more complicated and more honest. The cinematography here earns every compliment it received. What the memory contains isn’t shown in full; the restraint makes it count more.

In Your Radiant Season Episode 6 — The Sisters Clash
EP 06
The Sisters Clash
March 7, 2026
Chan returns to the U.S., and the absence lands harder than expected — for Ha-ran, and for the audience. The episode pivots to the three sisters, and the fractures between them come into focus: Ha-ran carrying the grief, Ha-young carrying the family, Ha-dam carrying the resentment of having been too young to carry anything at all. Han Ji-hyun makes every second of screen time count.

In Your Radiant Season Episode 7 — Digging Her Out
EP 07
Digging Her Out
March 13, 2026
Only one episode this week, and the show uses the space well. Chan’s return from the U.S. becomes the episode’s engine — his deliberate, patient effort to help Ha-ran back toward the world is the kind of slow emotional work that K-drama often rushes. Chae Jong-hyeop plays it with a gentleness that never tips into condescension. The show is quietly building something real here.

In Your Radiant Season Episode 8 — Confession and Its Complications
EP 08
Confession and Its Complications
March 14, 2026
The feelings are mutual, stated, and immediately complicated. Chan and Ha-ran acknowledge what’s between them — and then the drama adds a layer: his father, a borrowed watch, and a reconciliation that Ha-ran’s words make possible. The SHIM party sequence uses the social pressure of the fashion world to expose how much both leads have been hiding. The lie about the pen appears; the clock starts.

In Your Radiant Season Episode 9 — The Pen, the Bracelet, the Past
EP 09
The Pen, the Bracelet, the Past
March 20, 2026
Chan’s pen lie unravels — and his apology lands with the right weight. Meanwhile, Ha-ran wins an award and meets the sister of her late ex-boyfriend, setting off a chain of memories neither she nor the audience was fully prepared for. The episode ends on a three-way collision: Ha-ran, Su-jin, and Chan, the bracelet between them. The past is no longer in the past.

In Your Radiant Season Episode 10 — The Truth Surfaces
EP 10
The Truth Surfaces
March 21, 2026
Chan’s lie about the fountain pen has real weight now — to stay close to Ha-ran means deciding whether the truth is worth the risk. The sub-plot threads converge: Nana Kim’s dementia worsens and draws the sisters together in a way their ordinary arguments couldn’t. The maknae couple’s reunion gets handled with genuine warmth — a grocery store, a familiar scent, and the walls of photos in Yoo-gyum’s room doing more work than any speech could.

In Your Radiant Season Episode 11 — Before the Storm
EP 11
Before the Storm
March 28, 2026
The full weight of the past finally reaches Ha-ran — and the show earns the reveal it’s been building toward for ten episodes. How she responds to the truth about Chan and about who Hyeok-chan actually was tells us everything about how far she’s come. A birthday promise, a planned date, and then the chaos at the theater: the drama knows how to use earned happiness as setup for genuine stakes.

In Your Radiant Season Episode 12 — Their Radiant Season
EP 12
Their Radiant Season
April 3, 2026
The finale gives every thread the space it needs. Chan’s shrapnel, the sisters’ grief, Nana Kim’s decline — nothing is swept under a happy ending. What the show chooses to resolve and what it leaves as simply ongoing life is a quieter, more honest kind of conclusion than the genre usually allows. Ha-ran doesn’t become a different person; she becomes more fully herself. That’s the whole point.

✍️ Editor’s Take

Our honest read on the drama — what it does well, where it stumbles, and who it’s for.

🌸 Healing Romance
❄️ Frozen → Thaw
🧩 Layered Mystery
👯 Strong Sister Energy
😢 Cry-worthy

Lee Sung-kyung has done warm before — Weightlifting Fairy Kim Bok-joo gave her that — but In Your Radiant Season gives her something more demanding: a woman whose warmth has been buried under seven years of managed grief. The performance is built on restraint. Ha-ran isn’t cold; she’s exhausted in a very specific way, and Lee Sung-kyung is precise about exactly when to let the cracks show and when to snap the composure back into place. It’s some of her most controlled work, and it gives the eventual thaw real emotional weight rather than just narrative inevitability.

In Your Radiant Season (2026) — cinematic still

Chae Jong-hyeop as Chan is the drama’s most divisive element — and it’s worth being honest about why. His performance is relentlessly sunny in the early episodes, which some viewers find infectious and others find wearing. The character is designed that way deliberately: Chan’s cheerfulness is armor, not personality, and the episodes where that armor starts to crack — particularly from episode 7 onward — retroactively make the earlier lightness feel earned rather than shallow. If you’ve written Chan off by episode 3, give it two more. Chae Jong-hyeop is doing something more nuanced than the surface suggests, and episodes 7 and 8 are where it becomes clear.

The drama earns its Dramabeans comparison to Find Me in Your Memory and Our Unwritten Seoul — it lives in that same register of quiet, slow emotional healing. Where it distinguishes itself is the three-sister subplot, which is genuinely excellent and might be the most underrated part of the whole show. Han Ji-hyun as Ha-young is a revelation; the scene in episode 6 where the sisters finally fight properly is the kind of family writing that most K-dramas don’t bother with. The mystery mechanics are solid enough to keep you guessing without overshadowing the romance. One weakness: Nana Kim’s dementia subplot follows a very familiar playbook, and the show knows it — it doesn’t do enough to make it feel fresh. But the leads are real, the cinematography is genuinely beautiful, and the finale respects its own story enough not to clean up everything. In Your Radiant Season is the warmest drama of 2026, and it earns the title.

👍👍👍 BEST FOR 👍👍👍
🌸 Fans of Find Me in Your Memory, Our Unwritten Seoul, or Call It Love
❄️ Anyone who loves a slow-burn thaw — patience required, payoff delivered
👯 Viewers who want a family drama that pulls equal weight with the romance

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