What Is Your Sin?

"Captain, I think it's better to refuel here or by the time we reach the next station, we'll be only on 10% fuel." A young humanoid male, wearing a silver bodysuit armor said, pointing at two screens.

The first screen showed an empty region with a single blinking dot called 'Proxima'. The other screen showed the fuel of the ship. If they continue their journey until their destination, they'd risk running without any backup fuel.

"No." The Captain, a middle-aged humanoid-male, with facial features similar to the young man, replied instinctively.

In doing so, he accidentally let out the green gas from his mouth.

The young man coughed at the bitter smell and waved his hand, dispersing the gas. 

"Ah, shit! Why can't you stay quiet, you dumb kid?" The man glared at his nephew who stiffened at the sight of his throbbing neck nerves.

"S-Sorry but the…guide said we shouldn't run without an emergency fuel supply." He muttered weakly.