source- https://www.dlsite.com/maniax/circle/profile/=/maker_id/RG14831.html
Artist- https://www.pixiv.net/en/users/29088547/artworks

premise- A female diver vs. an octopus girl: an interspecies catfight
The battle between the "Ama" (female divers), human representatives who protect the sea, and the "Yokai" (demons) who seek to invade it, has continued for many years.

Tonight's battle sees a married, motherly veteran Ama facing off against a young octopus girl.

Despite her valiant efforts, the Ama is gradually entangled in the octopus girl's tentacles.
Will she be bound body and soul...?

23 pages, grayscale.
Includes textless version.

Follow up- https://www.pixiv.net/en/artworks/142210534

好喜欢肌肉女，可惜这种题材很少

Base +6