Vivy Prototype 4

From Author Wars - https://authorwars.com/books/vivy-prototype-4-3192002.html

Overview:

Title: Vivy Prototype 4
Author: 長月達平梅原英司
Year: 2021
Type: Novels
Series: Vivy FLourite Eye's Song
Number in Series: 4

Variant Titles:

2023. Vivy Prototype 4