Invaders of the Rokujouma!? 18

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Overview:

Title: Invaders of the Rokujouma!? 18
Author: Takehaya
Year: 2018
Type: Novels

Editions/Publications:

2018 . Invaders of the Rokujouma!? 18 (2018, Takehaya, J-Novel Club, ISBN-10: 9781718312388, $6.99, pages, ebook, Novel)
2021 . Invaders of the Rokujouma!? Collector's Edition 7 (2021, Takehaya, J-Novel Club, ISBN-10: 9781718308367, $29.99, 600 pages, Trade Paperback, Omnibus)