‘Dive Into You’ Sends Kim Ji Yeon and Jang Se Hyuk Back in Time in Each Other’s Bodies

Upcoming fantasy romance ‘Dive Into You’ is turning a family bond into a time-travel rescue mission. New stills focus on Kim Ji Yeon and Jang Se Hyuk as twin siblings Yoon Ha Na and Yoon Ha Ru, whose attempt to change the past becomes more complicated when their souls switch bodies.

In the present, Ha Na is an A-list actress while Ha Ru is a judo gold medalist. Their careers place them in very different worlds, reflecting a relationship built on shared history but contrasting personalities, ambitions, and approaches to reaching their goals.

Opposite twins reunited by loss

Ha Na and Ha Ru grew up together as blood-related twins, yet they developed into near opposites. Their dreams for the future differ, as do the methods they use to pursue them. By adulthood, both are occupied with separate lives and demanding careers.

The event that pulls them back together is the death of Jung Woo Jae, played by Park Seo Ham. Woo Jae is Ha Na’s first love and a friend so close to both siblings that they regard him as family. His death in an unexpected accident leaves the twins in deep grief.

While Ha Na and Ha Ru revisit memories of Woo Jae, an old camcorder reveals an extraordinary ability: it can send them into the past. The discovery turns remembrance into action, offering them a chance to do more than mourn the person they lost.

A return to age 18 with one major complication

The twins travel back to a time when they are 18 years old and together with Woo Jae. Their goal is direct but difficult—prevent his death and change a future that once seemed fixed. Because both siblings loved him as family, the mission gives their opposing personalities a shared purpose.

Time travel is not the only fantasy element they must manage. During the time slip, Ha Na and Ha Ru’s souls are switched. Each sibling must live in the past inside the other’s body, adding questions of identity and performance to the effort to save Woo Jae.

The body swap creates practical and emotional pressure. Ha Na and Ha Ru know each other intimately as twins, but knowledge is different from having to imitate another person’s behavior. To avoid disrupting their surroundings, each must understand how the other speaks, moves, and responds.

Kim Ji Yeon and Jang Se Hyuk prepared for that challenge by carefully matching their performances. They imitated one another’s speech patterns and habits so the switched souls would remain recognizable even when shown through different bodies.

Two actors playing four layers of identity

The setup asks both performers to handle more than their characters’ ordinary present-day and teenage selves. They must also convey Ha Na when she is physically Ha Ru and Ha Ru when he is physically Ha Na. The twins’ differences therefore become essential dramatic information rather than simple background description.

That performance structure may also reveal how well the siblings truly understand each other. Their separate adult lives suggest distance, while the body swap requires close observation and cooperation. Saving Woo Jae depends not only on knowing what happened but also on functioning convincingly as one another.

The new stills center this unusual partnership rather than treating the time slip as an individual journey. Ha Na and Ha Ru return together, share the same rescue objective, and face the same altered future. At the same time, each experiences that mission from the other twin’s physical position.

A fantasy romance built around changing fate

‘Dive Into You’ combines several engines for conflict: grief over an unexpected death, first love, a return to adolescence, contrasting twins, and a supernatural exchange of bodies. All of them point toward the central question of whether Ha Na and Ha Ru can bring Woo Jae back to life without creating unforeseen changes.

The drama will premiere on September 26 at 10:30 p.m. KST and will be available on Viki. Its opening premise places the twins at the center of both the fantasy and the emotional stakes, with their bond tested by the chance to rewrite a shared tragedy.

For Ha Na and Ha Ru, returning to age 18 is not a nostalgic escape. It is a deadline-driven attempt to protect someone precious to them, carried out while neither sibling can move through the past as themselves. Their success will depend on whether two opposites can act as one team—and as each other.