Made for mobile
Every scene is framed in 9:16 vertical. No black bars, no cropping, full immersion on any smartphone.
Seian
The Must-Watch Fantasy Short Anime of 2026.
Fantasy
Family Bonds
50 episodes
~90s per episode
9:16 vertical
- Studio
- Shortcat Studio
- Format
- Short vertical anime
- Genre
- Fantasy · Family Bonds
- Episodes
- 50
- Platform
- Shortcat, iOS & Android
- Episode length
- ~90 seconds
- Language
- English
- Status
- Now streaming
Synopsis
Kai, a heartbroken Grim Reaper who has guided souls for centuries, chooses oblivion after his ten-thousandth mission. But instead of fading away, he awakens as Seian, the troublesome youngest son of the Count of Shureiton. Now trapped in a noble household filled with secrets, he is drawn into mysteries that will redefine everything he knows about life… and death.
Why watch Seian on Shortcat?
Bingeable by design
90-second episodes end on a beat that makes the next one feel necessary.
Exclusive production
Seian is a Shortcat exclusive, produced in native vertical format by Shortcat Studio artists and writers.
Hand-drawn quality
Every key frame is drawn by human illustrators. Animation is produced with Shortcat Frames, Shortcat's proprietary AI-assisted tool.
Credits
Shortcat Studio / Story & art: Saidin, Hwanbom, Kim Kyou Dong
You might also like
About Shortcat
Shortcat is a mobile-first streaming app dedicated to exclusive short-form vertical anime. Every series on Shortcat is produced by Shortcat Studio artists for romance, fantasy, and supernatural fans who watch on their phones.