The sails billowed tightly, and the boat sped smoothly over the sea.

It wasn't as fast as a ship built with Earth's technology, but considering it was moving solely through one person's power, the speed was incredible.

Plus, it didn't require any fuel, making it an extremely eco-friendly…

"...or maybe not?"

Daeun tilted her head, uncertain about her own words.

"...probably not."

After all, miasma—known for turning animals into demon beasts and corrupting vegetation—could hardly be called eco-friendly. That was her conclusion after a brief moment of contemplation.

In any case, the reason Daeun could enjoy such a rapid and …