The airship carried them into the air above an island before descending, and Adam and Cowboy disembarked.

As soon as they emerged from the airship, they were immediately greeted by several employees, and that showed Adam the only possible hole in this so-called impregnable fortress.

"Human presence is still required. Even though machines can replace humans in the vast majority of cases, there are still some jobs that only humans can do."

Adam and Cowboy were led by the group of employees to the lake at the center of the aerial island, which had been constructed to resemble a beach, and there were some animals around the area that Adam recalled were supposed to have already been extinct.

Sitting on a beach chair on the artificial beach was a man in his fifties, and he stood up slowly upon witnessing the arrival of Adam and Cowboy...