No. 6

Season 1

Episode 10: What Lies in the Abyss

Shion and Nezumi climb the huge pile of bodies where they were dropped in and infiltrate the facility searching for Safu. Meanwhile, Rikiga and Dog Keeper leave the baby Shion saved to one of the dogs and gain entry into the facility by themselves to clear a path for Shion and Nezumi. Somehow, Shion knows exactly where to go and where all the cameras are, and this makes Nezumi a bit suspicious. He and Shion fight their way through the complex until Nezumi is wounded by a security guard. Shion kills him in retaliation, much to Nezumi's grief. When the duo manage to get through Safu's location, they find that she broke herself free and the researchers around her are lying dead on the ground.