ECHO
·エコー
The VOCALOID track "ECHO," which has garnered 8 million views, has been adapted into a novel. Authored by Akira, known for their work on the novelizations of “Yume Nikki” and “Ensemble Stars,” and illustrated by Oguchi, an illustrator for Kancolle, the adaptation expands on the song's theme of madness. The story reveals the identity of the TV girl, also referred to as “Primadonna.”