If you tuned in for a straight crime thriller, you may have been surprised by the unmistakable “date vibes” radiating off Lee Young-ae and Kim Young-kwang. KBS2’s new weekend series “Walking on Thin Ice” (also known as “Eunsoo’s Good Day”) frames the pair as reluctant partners trapped in a dangerous scheme—yet early stills and scenes hint at an intimacy that blurs lines between survival pact and budding attraction. 

The Setup: A Deal With the Devil—Or a Lifeline?

At the center is Kang Eun-soo (Lee Young-ae), an ordinary housewife buckling under the weight of a terminally ill spouse’s medical bills. A chance discovery of a bag of drugs yanks her into the underworld. Her unlikely counterpart is Lee Kyung (Kim Young-kwang), an after-school teacher with a double life—mild mannered in daylight, enigmatic after dark. Detective Jang Tae-gu (Park Yong-woo) closes in as their choices spiral. This premise anchors the show’s crime engine and moral tension. 

Why Viewers Are Sensing “Date Vibes”

Promotional cuts and preview stills showcase moments of charged eye contact, hushed exchanges, and physical proximity that read less like transactional partners and more like two people orbiting dangerous chemistry. Recent press highlighted sequences where Eun-soo and Lee Kyung’s alliance feels almost like a clandestine date—stylish outfits, intimate compositions, and a camera that lingers on micro-gestures. That romantic current doesn’t replace the thriller; it destabilizes it, making every glance a possible double-cross or confession. 

Performances: Steel Meets Smoke

• Lee Young-ae (Kang Eun-soo) returns to KBS for the first time in 26 years, channeling a quiet ferocity—maternal instinct sharpened into survival strategy. She plays Eun-soo as someone learning to weaponize vulnerability, a choice that makes her turn toward crime both shocking and grimly plausible. 

• Kim Young-kwang (Lee Kyung) is the show’s beautiful cipher. His soft-spoken exterior masks opaque motives; even moments of tenderness feel laced with risk. That tonal duality is what sells the “are-they-or-aren’t-they” reading of their scenes. 

• Park Yong-woo (Jang Tae-gu) delivers flinty counterweight as the veteran detective, grounding the story whenever the central duo’s chemistry threatens to romanticize the danger. 

Craft & Direction: A Thriller Shot Like a Melodrama

Director Song Hyun-wook composes the show like a romance you can’t fully trust: close-ups, reflective surfaces, and tight framing that compress space until even routine exchanges feel conspiratorial. Pair this with Jeon Young-shin’s script, which keeps motivations withheld just long enough, and you get that addictive K-thriller rhythm—slow burn punctuated by sharp, morally loaded choices. 

Themes: Money, Morality, and the Price of Tenderness

“Walking on Thin Ice” is less about drugs than debt—how desperation shreds boundaries. The series probes:

• Survival vs. ethics: When every won is a countdown to a loved one’s last treatment, what remains of “good”? 

• Identity as performance: Lee Kyung’s duality mirrors Eun-soo’s transformation; both craft personas to endure. 

• Intimacy in crisis: The “date vibes” aren’t sugar; they’re a coping mechanism—two people grabbing at warmth in a cold economy of fear.

Episode 1–3 Highlights (Spoiler-lite)

• The Bargain: Early episodes establish Eun-soo’s breaking point and her first uneasy pact with Lee Kyung. Their body language reads like strangers on a first date who’ve already shared a secret—tense, careful, drawn in despite themselves. 

• Fracture Lines: A pivotal scene shows Eun-soo literally on her knees, pleading—a stark reminder that their bond is transactional and fragile. The emotional charge of the moment fuels the “couple energy” discourse while underscoring the imbalance of power. 

• The Pursuit: Detective Tae-gu’s net tightens, cutting the duo’s tender beats short and reasserting the series’ thriller backbone. 

Broadcast & Where to Watch

The drama premiered September 20, 2025 and airs on KBS2 on Saturdays and Sundays at 21:20 KST. International availability varies, with KOCOWA+ marketing the title and Viki listing it with multilingual subtitles (availability dependent on region). Check your local platform for access. 

Will It Turn Into Romance—or Weaponize It?

For now, the series weaponizes romantic language—framing, costuming, musical swells—to complicate trust. Whether Eun-soo and Lee Kyung cross into explicit romance matters less than how the show uses closeness as leverage. The “date vibes” debate is the point: it keeps viewers complicit, rooting for an intimacy that might save them—or doom them faster. 

Bottom line: “Walking on Thin Ice” is a sleek, morally thorny thriller that flirts with romance to heighten dread. Lee Young-ae’s flint and Kim Young-kwang’s opacity create a volatile pairing you can’t stop reading into—because the show keeps asking whether love is a refuge, a lie, or the most dangerous weapon of all.