瑠璃の騎士

From Author Wars - https://authorwars.com/books/liu-li-noqi-shi-3231501.html

Overview:

Title: 瑠璃の騎士
Author: 橘公司
Year: 2022
Type: Novels
Series: 王様のプロポーズ / King's Proposal
Number in Series: 3

Variant Titles:

2023. The Lapis Knight