Their Key Rings

Go Ara

Lee Ok-rim

Seo Ju-hyeong

Jang Wook

Yoo Ah-in

Yoo Ah-in

Lee Eun-sung

Seo Jung-min

Kim Jung-min

Park Se-ri

Kim Si-hoo

Lee Soon-shin

Oh Yeon-seo

Lee Ye-rim

Kang Seok-woo

Lee Sang-heum

Kwak Ji-min

Kang Dong-hee

Kim Ha-kyoon

Kim Jung-sik

Choo Ja-hyun

Narration