Korean student stakes claim on her teacher ( Movie Clip- Innocent Thing )

Movie: Innocent Thing (English title) / Thorn (literal title)
Revised romanization: Gashi
Hangul: 가시
Director: Kim Tae-Gyun
Writer: Lee Sung-Min
Producer: Hong Ji-Yong, Kim Tae-Gyun
Cinematographer: Jung Han-Chul
Release Date: April 10, 2014
Runtime: 117 min.
Genre: Suspense-Thriller
Distributor: Invent D
Language: Korean
Country: South Korea

Plot
Joon-Ki (Jang Hyuk) is a popular P.E. teacher at a girl's high school. He is married to Seo-Yeon (Sun Woo-Sun) who is expecting their first child imminently.

During swimming class, a student named Young-Eun (Jo Bo-Ah) climbs up to the highest diving platform and jumps into the swimming pool. Joon-Ki jumps into the water and saves her. Days later, Joon-Ki is leaving school on a rainy late afternoon and runs into Young-Eun who is completely drenched. Joon-Ki takes Young-Eun back into school to change clothes. They spend time together in a classroom, with Young-Eun behaving in an flirtatious manner. Soon, Joon-Ki's marriage to Seo-Yeon is threatened.

Cast :
Jang Hyuk
Jo Bo-Ah
Sun Woo-Sun