The Underworld.
Not the kind of underworld riddled with tunnels from human oil drilling or mining, but the spiritual realm detached from the mortal world.

Within this realm stood a goddess and a god, bowing their heads respectfully before someone seated upon a throne.
The two figures were none other than Melinoe, goddess of nightmares, and Morpheus, god of dreams.
The one reclining on the throne before them, resting his chin on his hand, was Hades, god of the Underworld.

"So, the mortal I saw collapsed because he annoyed you, and you knocked him unconscious. And you ran off to the mortal realm because you were ‘bored’ with your duties in the Underworld?"
"Yes... I only planned to take a day off before coming back!"

How is it that her excuse is exactly the same as Thanatos' all those centuries ago?
Back then, Thanatos claimed he was tricked by the mortal Sisyphus and took a ‘break’ in the mortal realm.

"Well, humans are far more advanced now. It should be fine, right? Monsters are almost extinct, and..."
"Hmm, hmm. Lord Hades, Melinoe has a point. Perhaps this one time, you could..."