Hoshiori Academy—
A cloistered world built around the colossal furnace known as the Stellaforge.
Within this enclosure, students known as Starweaving Maidens offer what they hold dearest to the furnace for the sake of the stars' continued existence.
They have repeated this ritual countless times, burning their love, their wishes, and their destinies.
Until one day, Tsubaki Ueshima—an impurity left behind by the burning—unexpectedly crashes into their perfect cycle.
With her arrival, the academy’s long-buried secrets begin to surface…
“Board the train, and follow the path drawn by the Asterail.”