Description:

Song Jieun and Bang Yongguk is a married couple. They've been married for 6 years. But, one tragedy sets them apart. They're not a happy married couple anymore, they are strangers.

Characters:

Song Jieun

- 22 years old.

- Yongguk's wife of 6 years.

- had a hard time living without Yongguk.

Bang Yongguk

- 22 years old.

- suffers from amnesia.

- had forgotten about Jieun.

Lee Howon

- 21 years old.

- has a crush on Jieun.

- brother of Lee Jieun (IU).

Jung Soyoon

- 20 years old.

- the one who takes care of Yongguk when he has amnesia.

- has a little sister, Jung Nayoon.

Lee Jieun

- 19 years old.

- the lovable little sister of Howon.

Choi Joonhong

- 16 years old.

-  adopted little brother of Song Jieun.

- has a crush on Lee Jieun.