S1·E4 Impenetrable
Core
Aired April 23, 2026 24 min ★ 7.0/10 · 3 TMDB votes
Synopsis
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.
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Director & writers
Yasuhiro NakanishiWriterShigatsu YoshikawaDirector
Guest stars
Sakura ShinfukuTsukiko Shimojima (voice) Chiaki KobayashiTsubasa Igarashi (voice) Hazuki OginoManatsu Atagawa (voice) Saeko KamijoMari (voice) Manatsu MurakamiMuko (voice) Mitsuho KambeMei (voice) Wakana KowakaNoriko-sensei (voice) Toa YukinariSuwa-sensei (voice) Atsushi KosakaMatsumoto-sensei (voice) Kento ShiraishiTanaka (voice) Toshiki WatanabeTanaka's Friend (voice) Hiromu MinetaNishi High School Student (voice) Masato NiwaNishi High School Student (voice)
Frequently Asked Questions
When did Season 1 Episode 4 of The Ramparts of Ice air?
Season 1, Episode 4 ('Impenetrable') originally aired on April 23, 2026.
How long is Season 1 Episode 4 ('Impenetrable')?
The runtime for this episode is approximately 24 minutes.
What happens in The Ramparts of Ice Season 1 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....