A Muse (2012)

Cast
Park Hae-il (박해일) as Lee Jeok-yo (이적요)
Kim Moo-yeol (김무열) as Seo Ji-woo (서지우)
Kim Go-eun-I (김고은) as Han Eun-gyo (한은교)
Jeong Man-sik (정만식) as President Park (박사장)
Park Cheol-hyeon (박철현) as Blondie (노랑머리)
Jang Yun-sil (장윤실) as Reporter Kim (김기자)

Also known as "Eungyo"

Trailer

Synopsis
Lee Juk-Yo is a 70ish year old man who is a respected poet. He cares fondly for his 30ish year old disciple Seo Ji-Woo. The world of these two men are shaken when 17-year-old high school student Han Eun-Kyo comes into the picture, as their mind and sexual desires are awakened.