Eighteen years after the virus CLII was contained — a pathogen that killed more than half of all minors — Hana Sasamori is days from graduating high school in Sapporo when she begins living the same day on repeat. Quietly, desperately, she carries a feeling for Jyu-chan, the person who saved her once, that she has long decided to keep hidden. That decision — and the realization beneath it — has triggered something deep: a curse that will not let her move forward.