In rain-soaked Kurohama, magic isn’t a gift — it’s debt.

When university student Akiro Sato survives the collapse of a forgotten shrine, he becomes marked by a broken spiritual contract that should have claimed his life. Now invisible to ordinary people but painfully visible to those who traffic in hidden magic, Akiro is drawn into a secret war between the Shrine Wardens, who erase magical disasters to preserve public ignorance, and the Unbound, who reject control at any cost.

As the city’s ancient seals begin to fail, Akiro discovers the truth: every spell extracts a price — memories, even identity — and the more he stabilises Kurohama, the less of himself remains. Guided and guarded by the reserved Warden Rin Ayase, Akiro becomes the living anchor holding the city together.

But as magic spreads beyond containment and the public world starts to notice, Akiro must decide what matters more: saving a city that will never remember him, or saving what little humanity he has left.