

A young couple's love is tested when Sun-jin is diagnosed with a rare form of Alzheimer's disease.

Jung Woo-sung
Choi Chul-soo

Son Ye-jin
Kim Su-jin

Baek Jong-hak
Seo Yeong-min

Lee Sun-jin
Jung An-na

Park Sang-gyu
Mr. Kim

Kim Hee-ryung
Mother
Seon Ji-hyun
Jeong-eun

Kim Bu-seon
Madame Oh
Jang In-han
Supervisor

Kwon Byung-gil
Doctor Lee