The Summer Hikaru Died – Anime Review & Episode Guide

The Summer Hikaru Died is a Japanese anime series about a teenager dealing with the loss of his best friend. He's shocked when his friend reappears and suspects a monster has stolen his identity.

The Summer Hikaru Died is a Japanese anime series about a teenager dealing with the supernatural consequences of his best friend's death. The main character grew up in a small village with a childhood friend. They have shared a close bond for years, but his feelings deepened beyond friendship. One day, he loses his friend in an accident. When his companion suddenly turns up alive, the protagonist suspects a monster has taken over his friend's identity.

The popular anime adaptation of The Summer Hikaru Died lives up to all the hype. It offers an unpredictable story filled with complex emotions. While the series revolves around supernatural weirdness, the best scenes are always intimate and heartbreakingly poignant. The main character has feelings for his friend, but the story only teases a few intimate moments. It never turns their connection into a romance, so the BL content is minimal.

The Summer Hikaru Died Summary

Title:

光が死んだ夏

Series Info:

Japan (2025)

Length:

5 hours

Total Episodes:

12 episodes

Genre:

Supernatural horror

About:

The Summer Hikaru Died is a wild & intense drama.

Plot

Yoshiki and Hikaru are friends.

Yoshiki is a teenager who lives in a small rural town with his parents and younger sister. He is close to Hikaru Indo, his childhood best friend for years. They grew up together, attended the same school, and hung out at each other's houses. With a funny and energetic personality, Hikaru can bring the quiet Yoshiki out of his shell. Over time, Yoshiki has developed romantic feelings for his friend. Yet, he doesn't dare to reveal his secret crush to Hikaru.

One day, Hikaru goes hiking alone in a nearby mountain and suffers a deadly accident. When he doesn't come home, the village organizes a search party to find him. Yoshiki is too young to join, so he sneaks out to look on his own. There, he discovers Hikaru's lifeless body with a fatal injury. Days later, Yoshiki is stunned when Hikaru suddenly shows up alive. He's fully healed and acts like his usual energetic self. Hikaru appears to have the same personality, same mannerisms, and same memories, so all the villagers believe he's fine. Only Yoshiki suspects this "Hikaru" isn't who he pretends to be.

"Hikaru" behaves the same way he did before the accident. He still spends time with Yoshiki, acting friendly and recalling their memories. However, Yoshiki feels uneasy and senses he's speaking to an impostor. Finally, he confronts "Hikaru" and asks about his real identity. This "Hikaru" never expected anyone to know he's an impersonation. He clings to Yoshiki in tears, saying he doesn't want to kill him. Finally, "Hikaru" explains his identity. He's a mysterious creature with supernatural abilities. After living in the mountains for years, he entered Hikaru's dying body and claimed it as a host.

"Hikaru" never kills Yoshiki, although there are close encounters. When the creature loses control, its monstrous instinct urges it to consume Yoshiki. At one point, "Hikaru" lets Yoshiki touch the inside of his body. Yoshiki inserts his whole hand into this creature, touching all the mushy parts without hurting him. Despite looking exactly the same as his dead friend, Yoshiki realizes this creature is just borrowing his friend's body. Yet, Yoshiki is so devastated by Hikaru's death that he accepts the imitation. This is his only way of keeping Hikaru alive, even if it's a fake version of him.

Although this "Hikaru" tries not to hurt Yoshiki, he can be dangerous. He doesn't quite grasp the value of human life and ends up killing Matsuura, an elderly villager. His presence also draws other threatening entities around him. Yoshiki and his loved ones soon encounter bizarre events, such as his sister seeing a hairy monster in the bathroom. Yoshiki also meets Kurebayashi, a housewife, and Tanaka, a man in sunglasses. Both are familiar with the supernatural and become involved with "Hikaru".

The Summer Hikaru Died Trailer

The Summer Hikaru Died Cast

Characters

Yoshiki

Chiaki Kobayashi (小林千晃)

Yoshiki is voiced by Chiaki Kobayashi (小林千晃).

Yoshiki is a quiet teenager who grew up in a rural village and spent most of his childhood at Hikaru's side. He has secret feelings for his best friend. After witnessing Hikaru's death, he becomes overwhelmed with grief. When Hikaru suddenly reappears, Yoshiki senses something is wrong. He's the first person to confront "Hikaru" and realize this creature is an impostor.

Chiaki Kobayashi

Chiaki Kobayashi (小林千晃) is a Japanese actor. He is born on June 4, 1994.

Chiaki Kobayashi (小林千晃) is a Japanese actor. He is born on June 4, 1994. His first BL project is the 2024 anime series, Cherry Magic. He is also the lead of the 2025 anime special, A Love Too Captivating, and the 2025 series, The Summer Hikaru Died.

Hikaru

Shuichiro Umeda (梅田修一朗)

Human Hikaru is voiced by Shuichiro Umeda (梅田修一朗).

Hikaru is a lively teenager who grew up in the same village as Yoshiki. They have been best friends since childhood, and their fathers are also close. After his father dies, Hikaru lives with his mother. One day, Hikaru goes hiking in the mountains and suffers a deadly accident. In the moments before his death, a mysterious creature enters Hikaru's body and claims it as a host. Nobody except Yoshiki realizes this "Hikaru" is an imitation.

"Hikaru"

Shuichiro Umeda (梅田修一朗)

Fake Hikaru is voiced by Shuichiro Umeda (梅田修一朗).

"Hikaru" is a supernatural entity that has lived in the mountain for many years. When it discovers Hikaru dying, it slips into his body and uses it as a vessel. It inherits Hikaru's memories and behaviours, mimicking the teenager with uncanny accuracy. Although it forms a genuine attachment to Yoshiki, this version of "Hikaru" struggles to understand the value of human life. It also attracts other strange forces, turning the village into a hotspot of eerie occurrences.

Shuichiro Umeda

Shuichiro Umeda (梅田修一朗) is a Japanese anime. He is born on October 11, 1995.

Shuichiro Umeda (梅田修一朗) is a Japanese anime. He is born on October 11, 1995. His BL projects include the leading role for the 2025 series, The Summer Hikaru Died.

Supporting Cast

Kurebayashi is voiced by Wakana Kowaka (小若和郁那).

Kurebayashi

Wakana Kowaka (小若和郁那)

Tanaka is voiced by Chikahiro Kobayashi (小林親弘).

Tanaka

Chikahiro Kobayashi (小林親弘)

Asako is voiced by Yumiri Hanamori (花守ゆみり).

Asako

Yumiri Hanamori (花守ゆみり)

Maki is voiced by Yoshiki Nakajima (中島ヨシキ).

Maki

Yoshiki Nakajima (中島ヨシキ)

Yuki is voiced by Shion Wakayama (若山詩音).

Yuki

Shion Wakayama (若山詩音)

Yoshiki's sister is voiced by Seika Hirose (広瀬世華).

Kaoru

Seika Hirose (広瀬世華)

Yoshiki's mother is voiced by Ryoko Shiraishi (白石涼子).

Yoshiki's mom

Ryoko Shiraishi (白石涼子)

Yoshiki's father is voiced by Fuminori Komatsu (小松史法).

Yoshiki's dad

Fuminori Komatsu (小松史法)

Hikaru's father is voiced by Masatomo Nakazawa (中澤まさとも).

Hikaru's dad

Masatomo Nakazawa (中澤まさとも)

Hikaru's mom is voiced by Chie Nakamura (中村千絵).

Hikaru's mom

Chie Nakamura (中村千絵)

Hikaru's grandfather is voiced by Masayuki Omoro (小室正幸).

Hikaru's grandfather

Masayuki Omoro (小室正幸)

The teacher is voiced by Setsuji Sato (佐藤せつじ).

Teacher

Setsuji Sato (佐藤せつじ)

Takeda is voiced by Kouji Ishii (石井康嗣).

Takeda

Kouji Ishii (石井康嗣)

Yoshihiko is voiced by Kosuke Goto (後藤光祐).

Yoshihiko

Kosuke Goto (後藤光祐)

Takeda's grandfather is voiced by Takayuki Sugo (菅生隆之).

Takeda's grandfather

Takayuki Sugo (菅生隆之)

Matsuura is voiced by Kazuko Sugiyama (渋川佳寿子).

Matsuura

Kazuko Sugiyama (渋川佳寿子)

Matsuura's daughter is voiced by Yukiko Mannaka (満仲由紀子).

Matsuura's daughter

Yukiko Mannaka (満仲由紀子)

Young Yoshiki is voiced by Natsumi Kawaida (川井田夏海).

Young Yoshiki

Natsumi Kawaida (川井田夏海)

Young Hikaru is voiced by Yuki Urushiyama (漆山ゆうき).

Young Hikaru

Yuki Urushiyama (漆山ゆうき)

Mince is a neighbourhood cat.

Mince

The hamster is owned by Takeda.

Hamster

Cast Highlights

Chiaki Kobayashi

Yoshiki's voice actor is also the lead for other BL anime series, including Cherry Magic Anime (2024) and A Love Too Captivating (2025). When are BL fans going to give this man his props?

The Summer Hikaru Died Review

Review

Anime Review Score: 8.3

B+
Yoshiki and Hikaru have an intimate moment in the classroom.

The Summer Hikaru Died was on my radar for the past few years. This anime is based on a popular manga that generated a lot of hype everywhere. It has earned countless awards, critical acclaim, online recommendations, and, most importantly, the attention of BL fans. The gay subtext in this story is noticeable enough to catch the interest of yaoi enthusiasts. With so many promising signals, I watched the anime adaptation with high expectations. I can confirm The Summer Hikaru Died is as enjoyable as everyone says!

The Summer Hikaru Died begins with a super compelling premise. The protagonist's best friend dies in a sudden accident. BAM! And then, he gets replaced by a monster that can copy his behaviour perfectly. DOUBLE WHAMMY! This twist pulls the viewers into an unpredictable story filled with complex emotions. Poor Yoshiki mourns his friend's tragedy, fears the creature's strange abilities, feels confused about the impostor's existence, and despite everything… he still reaches out to Fake Hikaru for comfort. Each episode adds new layers to a beautifully intriguing story, so unlike anything I've experienced.

As a supernatural horror series, the story deals with a lot of weirdness. Creepy creatures wander through a small village, causing chaos and destruction. The paranormal stuff is what I find least interesting about The Summer Hikaru Died. The weakest episodes try too hard to explain the lore, especially when Yoshiki rambles on with his conspiracy theories. My favourite plots involve the intimate moments. The story shines when it focuses on Yoshiki's feelings, his odd friendship with the monster, and the question of whether Fake Hikaru's humanity is real or performative.

Is this BL??? The people working at the labels factory want to know if they can put those two letters on this anime. The BL content in The Summer Hikaru Died is hard to define. Yes, Yoshiki is attracted to Hikaru. The story reveals his one-sided crush, which explains why he can't move on after the death. Yet, the story only teases a few intimate moments and never turns this connection into a romance. Despite their close bond, they don't become a couple. His relationship with "Hikaru" is also unclear, but shipping the lead with a monster that nearly kills him feels freaky!

The Summer Hikaru Died looks as polished as any modern anime. The visuals are crisp and filled with vivid detail. This series excels at building its atmosphere, especially during scary scenes. It uses rapid cuts and sudden flashes of disturbing imagery to create tension. Some moments are gruesome, so BL fans who prefer gentler content may feel uneasy about the headless bodies. Hikaru appears human on the outside, yet a monster lives inside him. There are moments when he tries to "consume" Yoshiki. I don't know how to describe this, but it looks creepy as fuck!

The first and last episodes are the strongest, stirring up a wave of emotions within me. What I like about this series isn't the supernatural lore or solving the creature's identity, even though I have theories about it as a gay-adjacent metaphor. I'm more drawn to the psychological journey as the story follows Yoshiki's grief, confusion, regrets, and self-loathing. It also raises interesting questions about humanity. What makes "Hikaru" a monster? As a BL reviewer, I lower the score for the lack of romance, but The Summer Hikaru Died is a thoughtful anime that deserves the hype.

Summary

Intriguing story

The Summer Hikaru Died offers a compelling story with supernatural elements, so unlike anything I've experienced. Each episode adds fascinating layers to a complex and emotional anime series.

Weak romance

The story confirms Yoshiki has a secret crush on his friend. Despite their close bond, the story never turns their connection into a romance. I can't give a high score to only a few intimate moments.

Atmospheric visuals

This anime looks as polished as any modern series with sharp visuals and vivid details. It's excellent at creating an atmosphere, especially during scary moments. Expect lots of gruesome imagery!

Ambiguous ending

The Summer Hikaru Died has an ambiguous ending, so it isn't clear what the future holds for Yoshiki and Hikaru. The finale is emotionally charged and has me excited for Season 2.

Creepy style

This anime isn't too scary, but it features some disturbing imagery, like headless monsters and other creepy supernatural elements. The paranormal stuff is my least favourite part of the series.

83%

The Summer Hikaru Died is a thoughtful and emotionally rich anime with a compelling story. Although there isn't much romance, each episode brings complex plots, sharp visuals, and fascinating themes.

The Summer Hikaru Died Episodes

Episode Guide

Yoshiki and Hikaru look at each other.

The Summer Hikaru Died has a total of 12 episodes. Each episode is around 22 minutes long. It is a long anime series, and you can finish the entire series in under 5 hours. The Summer Hikaru Died started on July 6, 2025 and finished its first season on September 28, 2025. Yes, there will be a second season of The Summer Hikaru Died, which was announced in September 2025.

The Summer Hikaru Died is adapted from a popular Japanese manga. The original story is made by Mokumokuren (モクモクれん). Ryohei Takeshita (竹下良平) is the director of the anime series.

Episode 1
Episode 2
Episode 3
Episode 4
Episode 5
Episode 6
Episode 7
Episode 8
Episode 9
Episode 10
Episode 11
Episode 12

The Summer Hikaru Died Information

Creator

Mokumokuren (モクモクれん) is a Japanese artist

Mokumokuren (モクモクれん) is a Japanese artist and the original creator of the manga, The Summer Hikaru Died. The story was adapted into an anime series in 2025.

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