The Summer Hikaru Died is a supernatural horror story about friendship, grief and something that is not quite human. Its anime adaptation aired in 2025, and a second season has been announced. Here is what to know.
What Is the Story About?
Yoshiki Tsujinaka and Hikaru Indō are childhood friends in a small, rural Japanese town. Hikaru goes missing in the mountains, then returns. Yoshiki quickly realises that the person beside him is no longer his friend but an otherworldly being with Hikaru’s memories and feelings. He chooses to stay close anyway, even as stranger dangers gather around them.
Main Characters and Cast
- Yoshiki Tsujinaka, voiced by Chiaki Kobayashi.
- Hikaru Indō, voiced by Shuichiro Umeda.
- Asako Yamagishi, voiced by Yumiri Hanamori.
The Anime Behind the Hype
CygamesPictures produced the first season, with Ryōhei Takeshita as director. It aired from July 6 to September 28, 2025, for 12 episodes, and streams on Netflix. The studio announced that it would return for Season 2 as soon as the finale ended.
The Manga Is Ending
The anime adapts the manga by Mokumokuren, serialized in Kadokawa’s Young Ace Up since 2021 and published in English by Yen Press. The manga is scheduled to end with Chapter 51 on October 20, 2026. That gives the anime a complete story to adapt.
Season 2: What We Know
Season 2 was announced on September 28, 2025, with CygamesPictures returning. As of September 2026 coverage, no official release date had been announced. Estimates of a late 2026 or 2027 window are projections, not confirmed plans, so check official channels for updates.
Should You Watch It?
If you like slow-building horror grounded in character, yes. The scares come from atmosphere and emotional stakes rather than constant shocks, so it suits viewers who want unease and heart in equal measure.
Sources: Wikipedia, The Outer Haven, The Popverse.