A Prison jointly built by the Underworld Emperor and the Black Emperor?
A Prison... A Prison built on a secluded island, no less. What could they be keeping inside?
Klein had similar doubts to Roselle, but his attention was clearly focused on the motives of the Underworld Emperor and the Black Emperor.
Hmm... It was probably something extremely dangerous. Otherwise, they wouldn't have chosen a remote island in the sea...
Of course, they might also have wanted to avoid attracting attention.
While making wild guesses, Klein continued reading:
"May 14th. Using the main cannon of the 'Black Throne,' I finally blasted a crack through the seal at the entrance to the ruins.
"A monster emerged from inside. Its appearance was extremely bizarre—not any kind of Beyonder creature I recognized.
"It wasn't very strong, but it was immune to almost every ability except physical attacks.
"Edwards, several others, and I barely managed to kill it by joining forces. But after its 'Beyonder Characteristic' was extracted, I was unable to 'identify' which Sequence it belonged to...
"Was my prior knowledge insufficient, or was this monster simply that unusual?
"May 15th. After a night of consideration, I decided to seal the entrance to these ruins again for the time being.
"After all, we had a hard time dealing with just one monster. Who knew how many more of these things were imprisoned in this so-called 'Prison'?"
"I'll explore it again once I'm strong enough to deal with whatever's inside."
It seemed that his trip to the "Abyss" had made Roselle much more cautious and restrained. He wasn't as reckless as before...
That made sense. Although the Great Emperor was somewhat chuunibyou and always thought of himself as the "protagonist," if he had truly been the kind of person who never learned from his