Thanks Ialda! I also have the book. I don't read Japanese, but can you give me an idea of the plot? From what I understand from the pages, maria is tied up and Miko is kidnapped. The antagonist seems to be able to merge with rocks or walls, and can control tentacles. He forces maria to get down with Miko. That's what I get from the pics. If you can read Japanese, can you loosely tell me what is being said?
Also, the second to the last page, one of the tentacles is "special" because it is a penis, and not just a regular tentacle. To whose vagina does it enter, Maria's or Miko's? Is it possible to tell? I really hope it is maria who gets the penis tentacle. In the anime and other mangas, maria always gets off easy, and I don't think we've seen an explicit scene of her taking anyone else's cock other than her husbands (which is boring imo).
BTW, the new book is available at Toranoa: https://www.toranoana.jp/mailorder/article/04/0030/38/44/040030384412.html