The Summer Hikaru Died is a tV series anime that premiered in summer 2025, produced by CygamesPictures.

About the production: the story comes from a manga, there are 12 episodes of about 23 minutes and its current status is "finished".

Its main genres are horror, mystery, psychological, supernatural and thriller, with themes such as Monster Boy, Male Protagonist, Rural and Cosmic Horror.

On AniList, The Summer Hikaru Died has an average score of 81%, a very good score, and appears on 148,267 users' lists.

The franchise continues in or follows from: Hikaru ga Shinda Natsu 2nd Season.

Two best friends living in a rural Japanese village: Yoshiki and Hikaru. Growing up together, they were inseparable… until the day Hikaru came back from the mountains, and was no longer himself. “Something” has taken over Hikaru’s body, memories, feelings… and everything they know begins to unravel. (Source: Netflix)

Official synopsis from AniList.