Heartbeat

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• Screenwriter: Lee Si-eun
• Genre: romance
• Cast: Nam Joo-hyuk, Han So-hee

A romantic drama by Lee Si-eun, the screenwriter of «True Beauty» and «Lovely Runner.».

A romance set between the past and first loves

«Heartbeat» tells the story of a woman who can see into the past and a man forced to hide his own. Their encounter turns their lives upside down when a man appears who looks exactly like the young woman’s long-lost first love.

Nam Joo-hyuk will play Cha Shin-jo, a mysterious man who is hiding a dark secret from his past.

According to Korean media reports, Han So-hee has been offered the role of Hong Sa-rang, a woman with the ability to see the past. Her agency, 9ato Entertainment, confirmed that the actress is favorably considering the offer, though no final decision has been made yet. Update August 10, 2026: Han So-hee has now been confirmed for the drama’s cast.

The drama is produced by Bon Factory, the studio behind *Lovely Runner*, and promises a romance that blends emotion and fantasy, centered on the theme of eternal first love.

Filming for «Heartbeat» is expected to begin in late 2026.