TV series
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.
Streaming, rental and purchase options
Checked Jul 22, 2026
The Ramparts of Ice is available to stream on Netflix in United States. Use the direct links below to open the provider.
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.
Choose an episode, then use the watch options above for the show.
Episode 1
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.
Directed by Teru IshiiWritten by Yasuhiro NakanishiGuest stars Chiaki Kobayashi, Rikuya Yasuda, Hiromu Mineta, Hazuki Ogino, Saeko Kamijo, Manatsu Murakami, Mitsuho Kambe, Miria Takagishi
Episode 2
To Koyuki's relief, Yota comes to her rescue. After their initial study session, they grow more comfortable with each other — which unsettles Minato.
Directed by Mamoru EnomotoWritten by Yasuhiro NakanishiGuest stars Rikuya Yasuda, Gakuto Kajiwara, Wakana Kowaka, Hibiku Yamamura, Kento Shiraishi, Minori Fujidera, Toshiki Watanabe, Satoru Ito
Episode 3
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.
Directed by Yūichi AbeWritten by Yasuhiro NakanishiGuest stars Saeko Kamijo, Mitsuho Kambe, Toa Yukinari, Atsushi Kosaka, Yuka Yagami, Yuriko Hibi, Miria Takagishi, Masato Niwa
Episode 4
At Miki's prodding, Minato clarifies his interest in her best friend. An unexpected visitor triggers Koyuki's bad memories, leading to a harsh outburst.
Directed by Shigatsu YoshikawaWritten by Yasuhiro NakanishiGuest stars Sakura Shinfuku, Chiaki Kobayashi, Hazuki Ogino, Saeko Kamijo, Manatsu Murakami, Mitsuho Kambe, Wakana Kowaka, Toa Yukinari
Episode 5
Koyuki mulls over the tense exchange in the infirmary. After Yota clears the air, she tries to have an honest conversation with Minato for the first time.
Directed by Teru IshiiWritten by Yasuhiro NakanishiGuest stars Chiaki Kobayashi, Rikuya Yasuda, Gakuto Kajiwara, Miria Takagishi, Saeko Kamijo, Wakana Kowaka, Yuka Yagami, Yuriko Hibi
Episode 6
As winter break ends, the usually calm Minato begins to realize his feelings are changing. Miki notices how close Yota and Koyuki have become.
Directed by Teru IshiiWritten by Yasuhiro NakanishiGuest stars Sakura Shinfuku, Chiaki Kobayashi, Rikuya Yasuda, Gakuto Kajiwara, Miria Takagishi, Saeko Kamijo, Masashi Yamane, Kentaro Kumagai
Episode 7
After reflecting on her own loneliness and worrying that Yota is bottling everything up, Koyuki reaches out and asks about his true feelings.
Directed by Mamoru EnomotoWritten by Yuta SuzukiGuest stars Hazuki Ogino, Saeko Kamijo, Manatsu Murakami, Mitsuho Kambe, Wakana Kowaka, Hitomi Shogawa, Toshiki Watanabe, Rikuya Yasuda
Episode 8
Determined not to mess up high school, Miki has faked her persona since day one. But not being herself around her classmates starts to wear her down.
Directed by Yūichi AbeWritten by Yu OshikaGuest stars Rikuya Yasuda, Gakuto Kajiwara, Hiromu Mineta, Hazuki Ogino, Saeko Kamijo, Manatsu Murakami, Mitsuho Kambe, Wakana Kowaka
Episode 9
Minato realizes how Koyuki is always on his mind. Later, while hanging out at the new mall, the misunderstanding between the four friends deepens.
Directed by Shigatsu YoshikawaWritten by Yasuhiro NakanishiGuest stars Sakura Shinfuku, Chiaki Kobayashi, Hazuki Ogino, Masato Niwa, Hiromu Mineta, Kentaro Kumagai, Yuriko Hibi
Episode 10
A spring break trip to the amusement park brings the four friends closer. Back at school, Koyuki's surprised by a familiar face — and Minato takes notice.
Directed by Teru IshiiWritten by Yu OshikaGuest stars Sakura Shinfuku, Akari Kito, Kakeru Hatano, Natsumi Kawaida, Rikuya Yasuda, Gakuto Kajiwara, Kento Shiraishi, Toshiki Watanabe
Episode 11
Koyuki broods over her complicated past with Akine's sister, Manatsu, and what the first year might know. Meanwhile, Momoka sets her sights on Minato.
Directed by Miichiro KamenosonoWritten by Yasuhiro NakanishiGuest stars Chiaki Kobayashi, Akari Kito, Kakeru Hatano, Natsumi Kawaida, Hazuki Ogino, Rikuya Yasuda, Mitsuho Kambe, Minori Fujidera
Episode 12
As Koyuki slowly notices her new, surprising feelings towards Minato, first-year Momoka suddenly tries to cozy up to her — for reasons she can't grasp.
Directed by Teru Ishii, Takumi Yokoyama, Minagi KogaWritten by Kei ShimobayashiGuest stars Sakura Shinfuku, Chiaki Kobayashi, Akari Kito, Kakeru Hatano, Natsumi Kawaida, Rikuya Yasuda, Gakuto Kajiwara, Toa Yukinari
Episode 13
With Akine's words ringing in her head, Koyuki's feelings become complicated. Later, an accident causes something to shift between Miki and Yota.
Directed by Yūichi AbeWritten by Yasuhiro NakanishiGuest stars Sakura Shinfuku, Akari Kito, Kakeru Hatano, Natsumi Kawaida, Rikuya Yasuda, Gakuto Kajiwara, Hiromu Mineta, Masato Niwa
Episode 14
Unsure of how to move forward, Miki avoids Yota and confides in her colleagues. A bold Momoka confronts Koyuki about Minato and lights a fuse.
Directed by Aya KobayashiWritten by Yasuhiro NakanishiGuest stars Sakura Shinfuku, Akari Kito, Kakeru Hatano, Natsumi Kawaida, Rikuya Yasuda, Gakuto Kajiwara, Wakana Kowaka, Masaya Fukunishi
Episode information updated Jul 23, 2026
Anna NagaseKoyuki Hikawa (voice)
Fuka IzumiMiki Azumi (voice)
Shoya ChibaMinato Amamiya (voice)
Satoshi InomataYota Hino (voice)
Sakura ShinfukuTsukiko Shimojima (voice)
Chiaki KobayashiTsubasa Igarashi (voice)
Akari KitoMomoka Kuriki (voice)
Kakeru HatanoYuki Azumi (voice)
MBSJapan
TBSJapan
CBCJapan
Tulip TelevisionJapan
SBCJapan
BSNJapan
