Dealing with emotional barriers during high school rarely turns out to be an easy task. Sometimes, building an invisible wall around oneself seems like the only logical option to survive adolescence. This Thursday, a new trailer was released for the anime adaptation of the school romance webtoon written and illustrated by Kocha Agasawa, The Ramparts of Ice (Koori no Jyoheki), also confirming its premiere date for April 2nd.
The video brought with it quite an energetic musical preview. The sequences reveal part of the song "Tomei," a track performed by the rock band Novelbright that will serve as the series' official opening. To balance the musical credits, the group Polkadot Stingray will take the reins of the ending with the song "Sakasama".
Details of The Ramparts of Ice
The overall animation work falls into the hands of Studio KAI. The technical team includes Mankyu occupying the main director's chair. At his side, Yasuhiro Nakanishi structures the episode scripts, while Miki Ogino adapts the original drawings for character design. The ambient soundtrack was entrusted to composers Kanade Sakuma and Natsumi Tabuchi.
The committee also released the names that make up the main seiyuu cast in charge of bringing the student group to life:
Anna Nagase as Koyuki Hikawa.
Known for portraying Ushio Kofune in Summer Time Rendering and Riko Amanai in Jujutsu Kaisen.
Fuka Izumi as Miki Azumi.
Acclaimed in the industry for voicing Utena Hiiragi in Gushing over Magical Girls.
Shoya Chiba as Minato Amamiya.
Globally known for his role as Kiyotaka Ayanokoji in Classroom of the Elite.
Satoshi Inomata as Yota Hino.
An emerging talent in Japanese voice acting looking to establish his career with this project.
Chiaki Kobayashi as Tsubasa Igarashi.
Famous for portraying Mash Burnedead in Mashle and Gabimaru in Hell's Paradise.
Sakura Shinfuku as Tsukiko Shimojima.
A newcomer voice actress adding a key role to her initial career.
Kocha Agasawa originally published this story as a webtoon through the LINE Manga app between January 2020 and April 2022. Subsequently, Shueisha publishing house took the title to reorganize the panels into a traditional print reading format. Its fourteenth and final collected volume arrived in Japanese stores in February 2025. The manga accumulated nominations in the 2023 Shogakukan Manga Awards and managed to slip into the top 15 of the popular Kono Manga ga Sugoi! guide in its 2024 edition.
Synopsis of The Ramparts of Ice
Koyuki Hikawa is an extremely reserved student who has serious difficulties in relating to others. Her practical solution consists of building a cold wall to keep others at bay. Despite her distant attitude, her classmate Minato Amemiya insists on approaching her without a clear reason. The plot follows the daily friction and learnings of these young people, who are joined by the ever-popular Miki and the laid-back Yota to form a group full of emotional and social complications.
Do you think the vertical format of the original webtoon will affect how the studio approaches the visual narrative of this adaptation?
