Last Summer (Korean: 마지막 썸머) 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.
Contents
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.