The Summer Hikaru Died, Vol. 2 (light novel)

Something has replaced Yoshiki’s best friend Hikaru Indou. Yoshiki knows this, but he can’t bear to leave this new Hikaru’s side. As the pair return to their old routines together, Hikaru shows more and more frightening signs that he’s not human, and Yoshiki accepts that he may have to resort to drastic measures. Meanwhile, a mysterious man named Tanaka has found a clue about the eldritch being he believes is connected to the strange incidents occurring in Kubitachi—and it leads him straight to Yoshiki and Hikaru…