Six prodigies attend Kanezono Academy of Music, each with a mysterious past and a “color” tied to their soul’s melody. The story follows Ren Hayami, a withdrawn violinist who hasn’t played since his sister’s suicide. On his first day, he hears her melody echoing through the old concert hall—played perfectly by a girl he’s never met.
Soon, Ren and the other students are drawn into the “Symphony of Souls”, a ritual that binds their emotions to music. Every performance drains something from them—memories, feelings, or fragments of life itself. To graduate, they must each compose their Final Piece, but the truth is grim: only one can complete it, and the rest will vanish into their own unfinished songs.

Ren followed Nagi to a practice chamber tucked in the east wing. There, an old photograph lay on a desk: four students from twenty years ago, their eyes lifeless, yet one looked exactly like Nagi.


"They vanished," Nagi said softly, tracing the image. "The academy takes them once the music is complete. Only the one who finishes their soul's final piece survives."


Ren swallowed hard. "And if… if someone else finishes it?"


"They vanish anyway," Nagi whispered. "The academy doesn't care who survives. Only that the music is finished."


Ren felt the crimson thread tighten around him. So this is why Airi's song calls to me. Why she's tied to this academy. And why Ema…


Above them, the faint echo of Scarlet Strings whispered through the walls.


The first ghost of Kanezono's new symphony had begun to stir.


Chapter 15 - The Dead Quartet