Episode 12 of Last Summer premiered on Viki on December 7. The series tracks twin brothers split by their parents’ breakup. Younger twin Baek Do-ha was raised in the United States. Meanwhile, older twin Baek Do-yeong remained in South Korea. Both characters are played by Lee Jae-wook. Each summer, Do-ha makes a 21-day return to the home country, where he lodges in a duplex with his father and sibling.
Their neighbor Song Ha-gyeong (Choi Seung-eun) grew up next door. Her father is close friends with the twins’ dad. As kids, Ha-gyeong and the seasonal guest disputed constantly. Those fights, however, quietly turned into feelings. She never spoke them aloud. Soon, an incident changes their lives forever.
Last Summer episodes 11 & 12 brief recap
In earlier Last Summer episodes before the finale, Do-a keeps pressing Ha-gyeong to admit her real feelings. She tries to stay with Seo So-hyeok to prove she has moved on, yet she eventually realizes her emotions for Do-ha are stronger. She then ends her relationship with Soo-hyeok. He also accepts it quietly and asks for one final date.
They go to an amusement park in school uniforms, and he even invites D-ha, turning the day into a mild rivalry that closes his storyline on a calm note. After Ha-gyeong confesses, she and Do-ha start dating. They skip work, play games, cook small remedies, and make up for lost years. Meanwhile, Lee-seul, who planned to marry Seung-taek after a decade together, sees their relationship fall apart.
She later suggests the “Song Ha-gyeong game,” in which they say the opposite of what they feel. Seung-taek refuses and tells her he cannot stay friends. Do-ha and Ha-gyeong also face a turning point when Do-ha returns after five months with Baek Do-yeong’s remains. The long-feared truth is confirmed that his twin is no more.
At the same time, the Patan High School observatory project runs into trouble when public criticism rises suddenly. Do-ha senses manipulation. He works with Ha-gyeong and the village group, the Pavenjers, to trace the source. They uncover Jeon Nam-jin and Chang-joo, who stirred public anger to push a solar power project they invested in. Both are soon arrested. The team completes the observatory that Baek Do-yeong dreamed of.
After the project ends, Ha-gyeong gifts Do-ha a watch during a date. She urges him to restart the abandoned Hermann Project. He hesitates, but appreciates her thought. The finale begins with Do-ha and Ha-gyeong waking up together. Do-ha later complains to Su-bak that she knows the house’s birthday and Su-bak’s birthday but not his.
Ha-gyeong secretly plans a birthday surprise and asks others what he likes. They try to spend the day alone, yet his parents arrive unexpectedly and interrupt. During Christmas, Do-ha and Ha-gyeong enjoy a quiet evening. Meanwhile, Lee-seul and Seung-taek argue at a place they once visited yearly. The fight continues at the house until Do-ha and Ha-gyeong step outside to give them space.
Soon after, Do-ha finds an ultrasound photo and assumes Ha-gyeong is pregnant. He adjusts his behavior instantly, hoping to support her. Later, he learns the scan belongs to Lee-seul and Seung-taek, who reconciled on the same night they fought. Last Summer ends with Lee-seul and Seung-taek’s wedding. The bouquet lands in Ha-gyeong’s hands, hinting at her future. That night, Do-ha and Ha-gyeong share a quiet kiss.
Could there be a season 2 of Last Summer?
A second season for Last Summer looks unlikely. The story closes almost every major thread, and the finale doesn’t leave space for a new arc to grow. Do-ha and Ha-gyeong settle into a clear future. Their relationship reaches a steady place, not a cliffhanger. Moreover, Baek Do-yeong’s fate is also confirmed.
Lee-seul and Seung-taek also finish their long storyline with reconciliation and marriage. Soo-hyeok gets a proper send-off and doesn’t have an open path that needs exploring, too. Everything essential is tied up, and the drama ends in a way that signals completion rather than continuation.
Last Summer was broadcast on KBS2 in its regular weekend drama slot. Internationally, all 12 episodes are available for streaming on Viki.
Edited by Shreya Jha