The Rise of the Invincible System: the Demon King

Lou Xiaolou was a failed killer in his previous life. Because he always had kind thoughts in his heart, he failed to complete many tasks well. He was expelled from the organization and hunted down. During his escape, he accidentally traveled to a different world. He was originally a human but accidentally possessed a demon youth and became a member of the demon clan. He finally awakened the invincibility system. From then on, he sang all the way, killed his enemies and successfully dominated. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.