12 Beast manga volume 3 features story and art by Oyakado.

Sun, sand, and girls in bikinis playing volleyball...it's Eita's dream come true! Except for one little detail-- there girls are half animal. Eita's beach fantasy quickly dissolves into a nightmare when a giant squid shows up, bringing naughty tentacles to the party. All too soon, Eita, Aero, Jawea, and Asterio must leave their beach paradise to seek out Steela, the Witch of the Deep. But first, Eita must face his murkiest opponent yet: the evil Angler!