Chapter 7 of Hell's Paradise: Jigokuraku.
Gabimaru and Sagiri come face to face with a large strange fish creature and engages in battle. When Gabimaru struggles with killing the creature, he believes that it would be safe for them to run. However, they are surrounded by a horde of the same creatures. Seeing no way out, Gabimaru clears his head from other distractions and focuses on killing them. Sagiri watches in horror and is about to be attacked from behind. Gabimaru notices that Sagiri is in danger but focuses on killing the creatures. However, without knowing it, Gabimaru saved Sagiri but then has his head wrapped by one of the creatures tentacles.