High Martial: I'm the Only One Who Can Grind Achievements Without Limit!

When a boy from Earth inexplicably enters the body of a former top student from Blue Star, he expects to compete for supremacy, only to learn that he hasn't even awakened a superpower?! So what! The Achievement System will make me omnipotent and invincible! “Congratulations, Host, on achieving ‘Victory in Your First Battle.’ Reward...” “Congratulations, Host, on achieving ‘Where the Dream Began.’ Reward...” “Congratulations, Host, on achieving...”