Hyeri and Na In Woo May Be K-Drama’s Most Dangerous Couple Yet — Here’s What We Know

A spy wife. A secret agent husband. Both hiding who they really are — from the world and from each other. The Korean remake of Caution, Hazardous Wife is shaping up to be one of the most intriguing K-dramas in the pipeline, and the reported casting of Hyeri and Na In Woo has fans already counting down.

Hyeri and Na In Woo: Everything About the Drama

What Is the Show Actually About?

Based on the 2017 Japanese drama of the same name, the series follows the suspenseful married life of a spy wife in hiding and her husband, a black ops agent from the National Intelligence Service. Though once enemies, the two now live under the same roof while concealing their true identities and intentions.

Think Mr. & Mrs. Smith — but make it K-drama. The tension of two trained operatives sharing a bed while pretending to be ordinary is a premise rich with comedy, action, and slow-burn romantic potential. It’s the kind of setup that could produce electric chemistry if the casting lands right.

Hyeri has been offered the role of Jin Ja Young, who enters into marriage as part of her cover. Believing that keeping her neighborhood safe will bring her peace as well, she takes it upon herself to deal with troublemakers before the police arrive — though her plans are complicated by an unexpected obstacle: her seemingly perfect husband.

This marks Hyeri’s first time playing a married character, as well as her first role as a black ops agent ZAPZEE — a genuinely fresh territory for an actress known for her warmth and relatability.

Why Hyeri Is the Perfect Pick?

Lee Hye-ri, better known mononymously as Hyeri, rose to fame as the youngest member of girl group Girl’s Day, and later became known for her lead role in Reply 1988 (2015) — the highest-rated drama in Korean cable television history at the time. Wikipedia

She has been described as a “blue chip” in the entertainment industry due to her frank and easy-going charms, bright energy, and flexible chemistry with other cast members. Wikipedia

That flexibility is exactly what a dual-identity action-romance role demands. After Friendly Rivalry (2025) and with Dream to You already in the pipeline for 2026, Hyeri is in a career phase where she’s actively expanding her range — and a spy thriller would be a bold next step. For more on the best K-dramas to watch in 2026, check out our K-drama recommendations on TechnoSports

Na In Woo: The Man Behind the Secret

Na In Woo is reportedly in talks to play Hyeri’s husband — a National Intelligence Service black ops agent who is also hiding his identity. Na In Woo’s side has yet to officially comment on the reports.

Known for his charismatic screen presence in River Where the Moon Rises and Motel California, Na In Woo brings the right blend of intensity and charm for a character who needs to convincingly pass as an ordinary husband while operating as an elite operative. If confirmed, the pairing with Hyeri could be one of the most watchable on-screen couples of the year.

A Long Time Coming

Reports of a Korean remake first surfaced in 2023, when Chae Soo Bin was in talks for the lead role. The project has since undergone changes in both its storyline and casting.

The fact that the remake has taken this long to find its cast suggests the production team is being deliberate — and the names now attached give it real credibility. The K-drama industry’s track record with Japanese source material remakes has been strong, with several adaptations finding massive domestic and international audiences.

For more casting news and K-drama updates as they break, our entertainment coverage at TechnoSports keeps you in the loop.

FAQs