In a forgotten corner of Sunohara-sou, a musical mystery unfolds as a young caretaker discovers the hidden power of the Caretaker's Symphony, leading to a journey of self-discovery and redemption....

In a world where time itself is mutable, a caretaker at Sunohara-sou must make a life-altering decision in the last hour of his existence, testing the limits of his loyalty and the fabric of reality....