The story is set in a seaside hometown named Oboshiro Village which the protagonist, Yosuke Ashitaba, hasn't visited in eight years, as well as the memory-filled Oboshiro Church. Yosuke will not only reunite with his childhood friends, Yomi Natsusaki, Daiya Oboshiro, and Ruka Sagitsuki, but will also encounter a curious girl named Hinazakura Nonohara. Together, they will face the impending crisis of the church's demolition and unravel an intricate fairy tale mystery. In this never-ending summer vacation, weave a tale of promises and redemption together with the Oboshiro Choir Squad.