When a school girl disappears, suicide is suspected, and one of her classmates is suspected of having goaded her into it.
| Actor | Role |
|---|---|
 Jeon Yeo-binYoung-hee | Young-hee |
 Seo Young-hwaKyung-min's Mother | Kyung-min's Mother |
 Go Won-heeHan-sol | Han-sol |
 Lee Tae-kyungYu-ri | Yu-ri |
 Jeon So-neeKyung-min | Kyung-min |
 Yoo Jae-myungDetective Kim | Detective Kim |
 Seo Hyun-wooHomeroom Teacher | Homeroom Teacher |
 Jung In-giKyung-min's Father | Kyung-min's Father |
 Son Kang-gookYoung-hee's Father | Young-hee's Father |
 Heo Dong-wonDetective | Detective |
 Jeong Ae-hwaKyung-min's Grandmother | Kyung-min's Grandmother |
 Sunwoo Jung-aSinger | Singer |
 Park Gil-suPrincipal | Principal |
 Lee BomDa-som | Da-som |
 Shin Gi-hwanCursed Child | Cursed Child |
 Kim Se-inRestaurant Customer | Restaurant Customer |
| JJang Man-minClub Man | Club Man |
 Kim Han-solKyung-min's Family | Kyung-min's Family |