The plot follows Yoshiki and Hikaru, two high school boys living in a secluded mountain village. They are inseparable. But one day, Hikaru goes missing in the ominous "Yoshika Pass." He returns six days later. He acts like Hikaru. He laughs like Hikaru. He loves Yoshiki like Hikaru. But Yoshiki knows the truth: The thing that came back is not Hikaru.
Instead, the teasers showcase a mixed-media approach. When the entity loses control, the animation style shifts—colors invert, and the lines become chaotic and sketch-like, resembling a corrupted video file. This visual metaphor suggests that the entity is a corruption of the natural order. This is best exemplified in the "mountain" scenes, where the environment itself seems to pulsate, suggesting that the village is not just a setting, but an extension of the entity's digestive system. the summer hikaru died animation exclusive
What resides in Hikaru’s body is an unnamed "thing"—a mimic, an entity born from the mountain's strange spiritual energy. It has a child’s curiosity and a predator’s nature. The manga is a masterclass in tension, balancing quiet, melancholic romance with visceral, Cronenberg-esque body horror. The "thing" can twist flesh, manipulate sound, and has no concept of human mortality. The plot follows Yoshiki and Hikaru, two high
(CyPic) and has already been confirmed for a second season following its successful 12-episode debut. Series Overview & Exclusive Availability He acts like Hikaru