Chapter 4: Hakuyoku no Polaris
Chapter 3: Batoh
Chapter 2: The Girl Who Drifted to Me.
Chapter 1: The Swallow, Ciel Migrateur.
Novel by Aiki Abe Illustrations by Yasumo Published: March 31, 2017 *Please support the original author*
Epilogue: Another Promise.
Chapter 5: Hime.
Chapter 4: An Unavoidable Battle.