A new promotional video for the TV anime of Kōcha Agasawa’s Koori no Jyōheki (The Ramparts of Ice) manga confirms the anime’s April 2026 premiere on TBS and other channels in Japan. New cast and staff members for The Ramparts of Ice were also revealed alongside a new teaser visual.
The cast includes (left to right on image below):
- Anna Nagase as Koyuki Hikawa
- Fūka Izumi as Miki Azumi
- Shōya Chiba as Minato Amamiya
- Satoshi Inomata as Yota Hino
Mankyū directs the anime at Studio KAI. Yasuhiro Nakanishi is in charge of the series scripts, Miki Ogino is designing the characters, and Kanade Sakuma and Natsumi Tabuchi are the music composers.
The manga began as a webtoon on the LINE Manga app from January 2020 to April 2022. Shueisha published the manga’s 14th and final compiled volume on February 4, 2025.
Here’s an overview of the game, via MangaDex:
Inept at dealing with people, Hikawa Koyuki maintains a wall between herself and others. She spends her time in highschool away from others, all alone. At least until she encounters Amamiya Minato who keeps closing the distance between them for some reason?! The aloof Koyuki, the popular Miki, the boundary-less Minato, and the easygoing and kind basketball team member, Youta. This is the story of these somewhat complicated four, and their tantalizing, bumbling youth! In its original webtoon form!
Agasawa’s You and I Are Polar Opposites manga is also getting an anime adaptation in January 2026, and Crunchyroll will stream it.
