Galactic Vampire Princess

Our protagonist, Ari Smyth, was your everyday slacker, until he met truck-kun.
Truck-kun did what truck-kun does, and killed him.
After talking to a god, he was sent into the Immortal World as his reward.
However, how could he cultivate when he considered himself to be lazy?
Bonded with a system that forces him to cultivate, he charges into the new world to reach the apex, so he could laze around even more.