For Eternal Hearts (별빛 속으로 / Byeolbit soguro) (2007)

Suyoung who is a college professor in his 40s tells the class about his first love as they insist. Suyoung had to work his way through college in his 20s. He was attracted by a girl who had the look of 'Pippi Langstrump' in a classroom but plunged into despair, watching her disappearing into the cry of the times. Now the Pippi-lookalike girl shows up again before Suyoung who happens to meet Suji, a high school girl who charmed him at his part time work. Where does the reality end and who are dead or alive among them?