六畳間の侵略者! ?15

From Author Wars - https://authorwars.com/books/liu-die-jian-noqin-lue-zhe--15-2445927.html

Overview:

Title: 六畳間の侵略者! ?15
Author: 健速
Year: 2014
Type: Novels
Series: 六畳間の侵略者!? / Invaders of the Rokujouma!?
Number in Series: 15

Variant Titles:

2018. Invaders of the Rokujouma!? 15