Kagami Island, the island closest to the heavens. In the center of Mizukagami Lake, which mirrors the sky, stands a giant cherry tree said to be 1000 years old.

Kujou Souma, a student of Kagami Academy, will be advancing to the main school this spring. Welcoming the new spring, Souma thinks of someone precious he recently met. With his friends, and with someone precious. The days he's been walking with them, and the days he's longed for that connect to the future. On Kagami Island, where cherry blossoms dance in the wind, the story of lovers continuing into the future is once again woven—.