Last Summer () is a 2025 South Korean romantic comedy television series written by Jeon Yoo-ri, directed by Min Yeon-hong. It stars Lee Jae-wook, Choi Sung-eun, and Kim Gun-woo. The drama depicts two souls, one who shuns warmth and one who craves it, in a summer of self-discovery and love. It aired on KBS2 from November 1, to December 7, 2025, every Saturday and Sunday at 21:20 (KST). The drama is also available for streaming on Viki.
Cast and characters Main Lee Jae-wook as Baek Do-ha / Baek Do-young Kang Ji-yong as young Do-ha / Do-young Baek Do-ha: A talented architect. Baek Do-young: A mysterious figure. Choi Sung-eun as Song Ha-gyeong Song Ji-u as young Ha-gyeong A civil servant in the construction industry. Kim Gun-woo as Seo Soo-hyuk The youngest son of the law firm 'Seo & Joo' and an appellate lawyer.
Supporting Kwon Ah-reum as Yoon So-hee Do-ha's longtime colleague and friend. Ahn Dong-goo as Oh Seung-taek Jung Jae-geun Chae Dan-bi as Kim Da-ye Ha-gyeong's junior. Choi Byung-mo as Baek Ki-ho Do-ha's father. Kang Seung-hyun as Jeon Ye-eun
Production Last Summer is directed by Min Yeon-hong, written by Jeon Yoo-ri, and Monster Union and Slingshot Studio co-managed the production.
According to a report by Sports Chosun in August 2024, Lee Jae-wook and Choi Sung-eun are confirmed to star in the series.
The OST singer lineup, which includes Lee Mu-jin, Kim Min-seok, Heize, Paul Kim, Bibi, Ateez, and Illit (Yunah and Minju) was announced by Yum Yum Entertainment on October 23, 2025.
Viewership
+ Average TV viewership ratings Original broadcast date Average audience share(Nielsen Korea)Nielsen Korea ratings: Nationwide Seoul 1 November 1, 2025 2.6% 2 November 2, 2025 2.2% rowspan="11" 3 November 8, 2025 1.7% 4 November 9, 2025 1.8% 5 November 15, 2025 2.3% 6 November 16, 2025 2.1% 7 November 22, 2025 2.1% 8 November 23, 2025 1.6% 9 November 29, 2025 10 November 30, 2025 1.7% 11 December 6, 2025 2.1% 12 December 7, 2025 1.7% Average In the table above, the represent the lowest ratings and the represent the highest ratings. N/A denotes ratings that were not published.
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