Kiniro no Corda 3 AnotherSky feat. Amane Gakuen

A mysterious letter arrives carrying enrollment papers for Amane Gakuen. When the protagonist reads the invitation, something about it stirs a memory from seven years earlier—a boy who gave her a golden violin string. She transfers to Amane Gakuen with her childhood friend Kyouya, and barely settles in before the school's Myouga begins testing whether either of them deserves to be there.