Season 1 | Oasis -

: Three childhood friends—Lee Du-hak, Oh Jung-shin, and Choi Cheol-woong—navigate a complex love triangle. Their lives are shattered when a tragic accident occurs, and Du-hak's father forces him to take the blame for a crime committed by Cheol-woong, leading to a four-year prison sentence.

: The series explores the clash between ambition and morality, the "birth secret" trope common in melodramas, and the struggles of youth amidst a military regime and rapid economic growth. Key Cast & Characters Oasis - Season 1

: Du-hak's privileged childhood rival who constantly battles his own insecurities and unrequited love for Jung-shin. Reception and Viewing Information Oasis (Korean Drama) - AsianWiki : Three childhood friends—Lee Du-hak, Oh Jung-shin, and

: A bold, honest transfer student from Seoul who manages her family’s theater and remains the emotional anchor for both men. Key Cast & Characters : Du-hak's privileged childhood

: Years later, the trio reunites, but their paths have diverged sharply. Du-hak has become a "political gangster" seeking revenge for his family's suffering, while Cheol-woong has risen to power as an elite.

The story is set against the backdrop of a rural village and later moves into the gritty urban landscape of a changing South Korea.