The Dark Overlord

“You’re quite lucky. Aside from astronauts, you’re probably the first person to visit the moon without spending a penny!”
A sinister-looking old man, clad in a ghostly opera-style robe of deep blue, his face twisted in a perpetual sneer, gazed at the young man trapped within a thin, violet barrier and spoke.
The young man appeared to be around twenty, wearing a pair of brightly colored shorts. Of average build, his gaunt torso was bare, and his expression suggested he was owed money by the whole world. Inside the violet shield, he anxiously looked around, clearly agitated.
“Lucky? Lucky for what? You old lunatic, dragging me here—what exactly are you trying to do?”
Han Shuo was furious. In the sweltering summer heat, he’d been about to shower at home when a flash of white light appeared. Barely time to remove his shorts, this strange old man suddenly materialized before him, examined Han Shuo, muttered something about matching birth dates, then, without any explanation, grabbed Han Shuo and leapt out the tenth-floor window. Han Shuo fainted from terror.
When he came to, he found himself surrounded by darkness, barrenness, and silence. The ground was cratered, resembling the scarred skin of a burn victim. Then he was informed he was on the moon.
Perhaps the violet barrier was responsible, but on the moon, Han Shuo and the old man could communicate freely through it. Oddly, there was plenty of oxygen inside, so Han Shuo didn’t have to worry about suffocating.
“I don’t want anything in particular. Soon, I’ll engage in a decisive battle wit