BIG

18 years old Kang Kyung Joon's spirit suddenly becomes transplanted in the body of 30 years 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 years old Kang Kyung Joon. Jang Ma Ri is a girl who love Kang Kyung Joon and try any effort to escape Kang Kyung Joon's spirit from Seo Yoon Jae's body.