Trailer
Summary
After summer vacation, So-ri transfers to a new school and finds an anonymous letter in her desk drawer with an introduction to the school and a clue to finding the next letter.
Good for
- Date night
- Family movie night
- Friends night
Skip it if
- You want dark or edgy material
Where to watch
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At a glance
Critics vs audiences
Only audience scores so far
Audiences 74GoodWatch 74
Running time
1 h 36 min
A typical length for animated movies, +7 min on the typical 89
typical 8996Half of all animated movies run 80–99 min.
Reach
Streams in 21 countries, rent or buy in 2 more
+11
Released
2025
October 1, 2025
Last year
Genres
AnimationDramaMysteryAdventureLanguage
Korean
Original language
Made in
South Korea
15 people
Lee Su-hyunLee So-ri (voice)
Kim Min-juPark Dong-soon (voice)
Min Seung-wooJung Ho-yeon (voice)
Nam Doh-hyeongAhn Seung-kyu (voice)
Kim Yeon-wooKim Ji-min (voice)- LMLee Mi-naKim Sunny / Lee Su-kyung (voice)
- KCKim Chae-rinCho Ho-ran (voice)
- KYKim Yea-limYang Song-hee (voice)
Kim A-rongYoung Lee So-ri (voice)
Lee SerenaYoung Jung Ho-yeon (voice)- PKPark Ki-wookLee So-ri's Father (voice)
- KSKim Soon-miDoctor (voice)
Kim Hyeon-ukJersey (voice)- WJWon Jong-junMask (voice)
- CHChoi Hyun-sikBully from Hanwol Middle School (voice)
Directing · 2
- Kim Yong-hwan Director, Adaptation
- Oh Min-kyo Assistant Director, Editor
Writing · 4
- Jeong Eun-kyeong Writer
- Park Noo-ri Adaptation
- Cho A-ra Adaptation
- Cho Hyeon-a Comic Book
Production · 4
- Kim Jong-ryul Executive Producer
- Kwon Michelle Producer
- Lee Ha-rim Producer
- Choi Jun Producer
Camera · 1
- Oh Ju-yeon Director of Photography
Sound · 4
- Kim Tae-seong Original Music Composer
- Kim Yeon-jeong Original Music Composer
- Lee Su-hyun Theme Song Performance
- Kim Suk-won Sound Supervisor
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