The Summer Hikaru Died - Season 1
1 - Replacement
Air Date: July 6, 2025
Yoshiki confronts Hikaru about his suspicions and discovers the terrifying truth. Even though they try to live normally, eerie incidents begin to occur.
2 - Suspicion
Air Date: July 13, 2025
While Yoshiki and Hikaru accompany their classmates to a creepy mountain trail, a mysterious man arrives at Kubitachi Village and begins investigating.
3 - Denial
Air Date: July 20, 2025
Recalling childhood memories with Hikaru, Yoshiki continues to struggle with his complex emotions. Desperate, he reaches out to Kurebayashi.
4 - Summer Festival
Air Date: July 27, 2025
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.
5 - Wig Ghost
Air Date: August 3, 2025
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.
6 - Asako
Air Date: August 10, 2025
Yoshiki and his classmates discuss a story their teacher assigned them. Later, at a sleepover, Asako's sharp observations put her in grave danger.
7 - Determination
Air Date: August 17, 2025
After the sobering realization that Hikaru is truly dangerous, Yoshiki decides that he must act and invites his best friend to skip school together.
8 - Contact
Air Date: August 24, 2025
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.
9 - Old Man Takeda
Air Date: September 7, 2025
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.
10 - Truth
Air Date: September 14, 2025
The boys' surprise encounter with Tanaka lands them in the hospital. When they return to school, Yoshiki pieces together the truth behind Nonuki-sama.
11 - Indo's Sin
Air Date: September 21, 2025
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.
12 - Its Place
Air Date: September 28, 2025
While everyone else attends the school assembly, Asako finds Hikaru wandering the halls. Alone at the beach, Hikaru reveals his final plans to Yoshiki.