Can the Demon I Put a Bounty on Still Sleep?

Seven years ago, Jon's parents died mysteriously, and then he was adopted by his uncle Yuno. Because he took a fancy to Jon's ability, Yuno trained him to become a bounty hunter. On the journey of constantly chasing demons, Jon also continued to pursue the truth of the year and the mysteries of the world... (The male protagonist is a growth type, not brainless)