Series synopsis
The Ramparts of Ice, also known as 氷の城壁 is a Japanese animation drama television series that premiered on MBS on April 2, 2026. It stars Anna Nagase, Fuka Izumi, Shoya Chiba and Satoshi Inomata.
Weighed down by memories she can't shake, high schooler Koyuki Hikawa keeps everyone at arm's length — until three schoolmates draw her out of her shell.
Premise
Weighed down by memories she can't shake, high schooler Koyuki Hikawa keeps everyone at arm's length — until three schoolmates draw her out of her shell.
Cast and characters
Leading cast
- Anna Nagase as Koyuki Hikawa (voice)
- Fuka Izumi as Miki Azumi (voice)
- Shoya Chiba as Minato Amamiya (voice)
- Satoshi Inomata as Yota Hino (voice)
Guest cast
- Sakura Shinfuku as Tsukiko Shimojima (voice)
- Chiaki Kobayashi as Tsubasa Igarashi (voice)
- Akari Kito as Momoka Kuriki (voice)
- Kakeru Hatano as Yuki Azumi (voice)
- Natsumi Kawaida as Akine Atagawa (voice)
- Gakuto Kajiwara as Daichi Midorikawa (voice)
- Hazuki Ogino as Manatsu Atagawa (voice)
- Manatsu Murakami as Muko (voice)
- Saeko Kamijo as Mari (voice)
- Rikuya Yasuda as Hayato Akahoshi (voice)
- Toa Yukinari as Suwa-sensei (voice)
- Atsushi Kosaka as Matsumoto-sensei (voice)
Episodes
This series spans 2 seasons with 15 episodes.
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 14 | April 2, 2026 | July 2, 2026 |
| Season 2 | 1 | October 1, 2026 | October 1, 2026 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Lines and Walls After her classmates run off in fear, Koyuki makes faces in a mirror to figure out why everyone finds her scary. Suddenly, a boy sneaks up behind her. |
April 2, 2026 |
| 2 |
Locksmith To Koyuki's relief, Yota comes to her rescue. After their initial study session, they grow more comfortable with each other — which unsettles Minato. |
April 9, 2026 |
| 3 |
3+(←)1 Bothered that Koyuki still has her guard up around him, Minato tries to make small talk. As Miki grows suspicious of his intentions, she confronts him. |
April 16, 2026 |
| Episode | Title | Air date |
|---|---|---|
| 1 | Episode 1 | October 1, 2026 |
Production
Release
| Original network/platform | MBS |
|---|---|
| First aired | April 2, 2026 |
| Last aired | July 2, 2026 |
| Runtime | 24 minutes |
| Status | Returning Series |
| Schedule | Thursday at 23:56:00 |