The cast of Dive into You is led by Kim Ji Yeon, better known as Bona, and Park Seo Ham. The Korean romance also brings in Jang Se-hyeok and Moon Seung-yu, whose characters become essential once love, loss and a journey into the past begin to change everyone’s fate.
Who plays whom in Dive into You?
1. Kim Ji Yeon (Bona) as Yoon Ha Na
Kim Ji Yeon, also known as Bona, was born on August 19, 1995, in Daegu. She debuted in the group WJSN (Cosmic Girls) in 2016 and appeared in The Best Hit (2017) and Twenty Five, Twenty One.
She plays Yoon Ha Na, a famous actress who appears to have a perfect life but keeps her feelings to herself. After losing Jung Woo Jae, her best friend and first love since school, she gets the chance to return to the past and change his fate. Determined yet vulnerable, she must also deal with an unexpected body swap with her twin brother.
2. Park Seo Ham as Jung Woo Jae
Park Seo Ham was born on October 28, 1993. He trained with Big Hit and JYP, debuted with KNK in 2016, and gained attention as Jang Jae Young in Semantic Error (2022).
He plays Jung Woo Jae, Ha Na’s first love. Quiet, reserved and introspective, he is sincere and devoted to the people he loves. A former promising judoka, he had to give up the sport and becomes Ha Na’s bodyguard. He shows his feelings through actions rather than grand declarations.
Where to follow: IG @parkseoham
3. Jang Se-hyeok as Yoon Ha-ru
Jang Se-hyeok plays Yoon Ha-ru, Ha Na’s twin brother and a judoka. A close friend of Woo Jae and Seo Ye-rang’s boyfriend, he also takes part in the trip to the past and becomes involved in the body swap with his sister.
Ha-ru is more than just support for Ha Na. His choices directly affect his friendship with Woo Jae and his relationship with Ye-rang, expanding the impact of the changes to the past beyond the central couple.
Where to follow: IG @jangsehyuk_
4. Moon Seung-yu as Seo Ye-rang
Moon Seung-yu plays Seo Ye-rang, a manager connected to Ha Na’s agency and Ha-ru’s girlfriend. She is an important figure in Ha Na’s career, recognizing her potential and helping her become a prominent actress.
Close to both siblings, Ye-rang may be affected by the decisions made during the time travel. Her presence connects the professional, family and romantic storylines, expanding the story beyond the central couple.
Where to follow: IG @moonseungyou
When does Dive into You premiere?
Dive into You premieres on September 26, 2026. Bona and Park Seo Ham lead the time-travel romance, supported by Jang Se-hyeok and Moon Seung-yu.
For episode count, streaming availability and story details, read our complete guide to Dive into You.
Quick facts
Title
Dive into You
Original title
너에게 다이브
Country
South Korea
Premiere
September 26, 2026
Episodes
12
Streaming
Disney+ and Viki
