Title: Akphut Het Sneh 2012 - Big 빅 Grande

18-year-old Kang Kyung Joon's spirit suddenly becomes transplanted in the body of 30-year-old Seo Yoon Jae. Seo Yoon Jae is a successful doctor and engaged to high school teacher Gil Da Ran. Gil Da Ran just so happens to be the teacher of 18-year old Kang Kyung Joon.