I don't think there are many actresses out there able to pull a believable 17 years old school girl and a 32 years old mom at the same time, but Kim Hee Seon did it with flying colours !
Loved her a rebelious teenager who overcame tragedy and sacrificed herself to provide a good family for her daughter at the cost of a sublevel husband and hag of a mother inlaw. Then she comes to life as her feisty young self and goes back to school under assumed identity to protect her daughter from bullies.
A beautuful, complex story, dark abd comedic, brave and heartbreaking, with unexpected romance,