Last Summer ~ A Twin-Tangled Romance That Redefines K-Drama Tropes

By cmoneyspinner - November 8, 2025

“Last Summer” is a 2025 Viki Original Korean drama, 12 episodes, categorized as Romance and Comedy (Rom-Com).

Memorable Quote: “Back then, I didn’t know this war between us would last so long.”

SUMMARY: Identical twins were separated after their parents’ divorce: One lives in the U.S., while the other grew up in Korea next to their childhood friend. The three share summers together, and their childhood friend develops feelings for the twin who lives in America. After tragedy strikes, she and the twin brothers are forced to reckon with their past. Neither are sure what it might mean for their future together.

♦ I Want to Be More Than a Friend, But I Don’t Want to Ruin Our Friendship

In “Last Summer”, the plot weaves together childhood memories, hidden regret, and the unravelling of first-love bonds. In a seaside village, young twins, Baek Do Ha and Baek Do Yeong, get separated because of their parents’ divorce. Baek Do Ha lives in the U.S., while Baek Do Yeong grew up in Korea next to their childhood friend Song Ha Gyeong.

But the three spend summers together, and then Baek Do Ha must go back to America. As an adult, Baek Do Ha is a talented architect, and he decides to return to Korea to stay for 21 days at the duplex house built by his father. There, he reconnects with his brother Baek Do Yeong and their next-door neighbor, Song Ha Kyung.

Song Ha Kyung harbors feelings for Baek Do Ha, but she never opened up to him because … he was only ever there for the summer. He lives in the USA and will likely meet many girls there who are interested in him. Why start something you can’t maintain? Besides … at least they’re good friends. As the trio matures, time and distance deepen the divide.

Baek Do Ha became an architect while in America.
Song Ha Kyung works in Korea as a civil servant in the architecture department.
Baek Do Yeong remains in Korea but carries his own unresolved emotions and shadows of memory because of an incident that fractures the equilibrium of their childhood summers.

♦ I am a Visiting Guest (NOT!)

In adulthood, Baek Do Ha returns to Korea once again, “technically” as a visiting guest but also determined to confront what has been buried. Song Ha Kyung is carrying an emotional scar and now avoids the summer season because it’s a reminder of her loss. Having Baek Do Yeong there, the twin element complicates the emotional terrain. Their emotional reunion is fraught: the nostalgia of shared summers, the guilt of unspoken words, and the guilt born from the incident that separated them two years ago.

Song Ha Kyung grapples with the feelings she locked away, and Baek Do Ha must bear the weight of a secret that has shaped his choices. The physical “peanut house” of their childhood summers becomes a metaphor for their emotional architecture, frameworks of memory, of walls built and knocked down, of rebuilding what was broken.

♦ Want to Make a Love Triangle More Complicated?

Another figure enters the fray in the form of Seo Soo Hyuk, a lawyer whose relationship with Song Ha Kyung evolves into something more than just colleague support. His presence adds an extra dynamic to the love triangle, as if the relationship of the trio isn’t already muddled with wounded hearts and sad memories.

Song Ha Kyung must ask herself: Is the boy who visited each summer the same man who now stands before her?
Baek Do Ha must decide: Can he step out of his twin’s shadow and into his own truth?
Baek Do Yeong must find meaning beyond the quiet twin role he has played.

Depending on the outcome, this might be their “last summer”. Can they rebuild and move beyond the summers past?

Main Characters:

Baek Do-Ha (played by Lee Jae-Wook, “Dear Hongrang”, “The Impossible Heir”, “Death’s Game”, “Alchemy of Souls 1 and 2”, “Search: WWW”)
Song Ha-Kyeong (played by Choi Sung-Eun, “My Name is Loh Kiwan”, “The Sound of Magic”)
Seo Soo-Hyeok (played by Kim Gun-Woo, “You and Everything Else”, “The Glory 1 and 2”)

Where to Watch

Viewership and Rating:

IMDb: 8.3 out of 10 stars
My Drama List: 7.8 out of 10 stars
Viki viewers rated this series 9.6 out of 10 stars

My personal rating is the same as IMDb.

“Last Summer” wasn’t phenomenal. Most people probably just watched it because the male lead is a popular South Korean actor, and he was playing a double role.