遥かなる帰路

From Author Wars - https://authorwars.com/books/yao-kanarugui-lu-3137293.html

Overview:

Title: 遥かなる帰路
Author: 神坂一
Year: 2019
Type: Short Fiction
Series: スレイヤーズ (Slayers)
Number in Series: 17

Variant Titles:

2023. The Long Road Home