六畳間の侵略者!? 7

From Author Wars - https://authorwars.com/books/liu-die-jian-noqin-lue-zhe--7-2461041.html

Overview:

Title: 六畳間の侵略者!? 7
Author: 健速
Year: 2011
Type: Novels
Series: 六畳間の侵略者!? / Invaders of the Rokujouma!?
Number in Series: 7

Variant Titles:

2017. Invaders of the Rokujouma!? 7