Upon being sent to live with relatives in the countryside due to an illness, an emotionally distant adolescent girl becomes obsessed with an abandoned mansion and infatuated with a girl who lives there - a girl who may or may not be real.
| Actor | Role |
|---|---|
 Sara TakatsukiAnna Sasaki (voice) | Anna Sasaki (voice) |
 Kasumi ArimuraMarnie (voice) | Marnie (voice) |
 Nanako MatsushimaYoriko Sasaki (voice) | Yoriko Sasaki (voice) |
 Susumu TerajimaKiyomasa Oiwa (voice) | Kiyomasa Oiwa (voice) |
 Toshie NegishiSetsu Oiwa (voice) | Setsu Oiwa (voice) |
 Ryoko MoriyamaElderly Lady (voice) | Elderly Lady (voice) |
 Kazuko YoshiyukiNanny (voice) | Nanny (voice) |
 Hitomi KurokiHisako (voice) | Hisako (voice) |
 Hiroyuki MorisakiArt Teacher (voice) | Art Teacher (voice) |
 Takuma OtooNeighborhood Association Officer (voice) | Neighborhood Association Officer (voice) |
 Hana SugisakiSayaka (voice) | Sayaka (voice) |
 Bari SuzukiElderly Lady 2 (voice) | Elderly Lady 2 (voice) |
 Shigeyuki TotsugiMarnie's Father (voice) | Marnie's Father (voice) |
 Ken YasudaToichi (voice) | Toichi (voice) |
 Yo OizumiDr. Yamashita (voice) | Dr. Yamashita (voice) |
 Yuhko KaidaMarnie's Mother (voice) | Marnie's Mother (voice) |
 Renge IshiyamaEmily (voice) | Emily (voice) |