

Six months ago, Hikaru vanished for a week. Now, as his best friend Yoshiki senses something amiss and confronts him, the harrowing truth emerges.
TV-14 • Animation, Drama • Series • 2025 • 2 seasons
Starring: Chiaki Kobayashi, Shuichiro Umeda, Chikahiro Kobayashi

S1 E1 - Replacement
Yoshiki confronts Hikaru about his suspicions and discovers the terrifying truth. Even though they try to live normally, eerie incidents begin to occur.
Jul 6, 2025 • 24m

S1 E2 - Suspicion
While Yoshiki and Hikaru accompany their classmates to a creepy mountain trail, a mysterious man arrives at Kubitachi Village and begins investigating.
Jul 13, 2025 • 24m

S1 E3 - Denial
Recalling childhood memories with Hikaru, Yoshiki continues to struggle with his complex emotions. Desperate, he reaches out to Kurebayashi.
Jul 20, 2025 • 24m

S1 E4 - Summer Festival
As Yoshiki attends the summer festival with Hikaru, the village elders fret over the recent death and Tanaka ends up with more questions than answers.
Jul 27, 2025 • 24m

S1 E5 - Wig Ghost
When Yoshiki's sister spots a creepy clump of hair in the bathroom, Hikaru visits the Tsujinaka home to investigate — but things take a deadly turn.
Aug 3, 2025 • 24m

S1 E6 - Asako
Yoshiki and his classmates discuss a story their teacher assigned them. Later, at a sleepover, Asako's sharp observations put her in grave danger.
Aug 10, 2025 • 24m

S1 E7 - Determination
After the sobering realization that Hikaru is truly dangerous, Yoshiki decides that he must act and invites his best friend to skip school together.
Aug 17, 2025 • 24m

S1 E8 - Contact
Yoshiki and Hikaru investigate Nonuki-sama and its link to Kubitachi's history. While at the library, they get an important lead from a surprising source.
Aug 24, 2025 • 24m

S1 E9 - Old Man Takeda
Kurebayashi shares her knowledge about impurities with the boys. Later, the elder Takeda loses his temper over Hikaru's ignorance of the Indo's history.
Sep 7, 2025 • 24m

S1 E10 - Truth
The boys' surprise encounter with Tanaka lands them in the hospital. When they return to school, Yoshiki pieces together the truth behind Nonuki-sama.
Sep 14, 2025 • 24m

S1 E11 - Indo's Sin
Though hesitant, Yoshiki asks his father about the Indo family's murky past and secret ritual. Later, Hikaru loses control at school and feels deeply shaken.
Sep 21, 2025 • 24m

S1 E12 - Its Place
While everyone else attends the school assembly, Asako finds Hikaru wandering the halls. Alone at the beach, Hikaru reveals his final plans to Yoshiki.
Sep 28, 2025 • 24m
The Summer Hikaru Died
Six months ago, Hikaru vanished for a week. Now, as his best friend Yoshiki senses something amiss and confronts him, the harrowing truth emerges.
TV-14 • Animation, Drama • TV Series • 2025

Featurette
“Making-of” (Part 3) : Hikaru and Yoshiki [Subtitled]