恋人は幽霊

From Author Wars - https://authorwars.com/books/lian-ren-hayou-ling-3263089.html

Overview:

Title: 恋人は幽霊
Author: 谷瑞恵
Year: 2005
Type: Novels
Series: 伯爵と妖精 / Earl and Fairy
Number in Series: 4

Variant Titles:

2023. The Spectral Lover