With the true purpose of the ritual and the killing stone revealed, Bell decides that he's going to take any risk to save Haruhime.

Bell shouldn’t get involved. But the young adventurer has already decided otherwise. Little does he know that he’ll help Fels discover a secret even Uranus doesn’t know.

Bell and his party are making good time and will soon enter the lower floors. But the dungeon crawl is going too smoothly, and Cassandra cannot shake her earlier premonition.

Ryu couldn’t be the killer… right? Bell wants to help his friend, but as the body count grows higher, he must ask himself how well he truly knows her.

Bell and Ryu’s relationship deepens as the trauma of the Deep Floors pushes them past their limits. They have each other, and that is the only reason they’re both still alive.