無垢なる氷姫

From Author Wars - https://authorwars.com/books/wu-gou-narubing-ji-2864717.html

Overview:

Title: 無垢なる氷姫
Author: 迷井豆腐
Year: 2017
Type: Novels
Series: 黒の召喚士 / Black Summoner
Number in Series: 4

Variant Titles:

2021. The Pristone Ice Princess