The Summer Hikaru Died - S01

Six months have passed since Yoshiki Tsujinaka's best friend, Hikaru Indou, disappeared in the mountains and came back a week later with no memory of what happened. Convinced that the Hikaru who returned is not the one he knew, Yoshiki finally asks him about it. All at once, "Hikaru" shows his true monstrous form and begs Yoshiki to keep it a secret, because he does not want to kill him. Despite his paranormal nature, "Hikaru" seems almost innocent, full of childlike wonder and eager to experience the summer heat, the countryside, and all kinds of other things in a human body for the first time. And for Yoshiki, it hardly matters if "Hikaru" is a fake living on stolen memories, as long as he never leaves again. As Yoshiki desperately clings to "Hikaru" in his intense grief, it becomes increasingly clear that something dangerous and supernatural may have come down from the mountains into their village.