18 vs 29 (2005)

Yoo Hye-chan is unhappily married to Kang Bong-man, a top actor. On her way to file for divorce, Hye-chan is suddenly involved in a car accident. When she wakes up at the hospital, her mindset has reverted to that of an 18-year-old. Bong-man tries to support his wife the best he can during her recovery; their relationship slowly rekindles.