He was the crown prince in Demon World. While she is known as the most beautiful demon in Demon World. He was considered as almighty while she was considered as the villainess. They were both powerful and strongest among all, but people treated them differently. In the society, if you make bad decisions that's what they'll notice... Does that mean, making good decisions didn't matter to them at all? As long as they're safe and the people who saved them weren't? When Wei Shuye, the crown prince of Vampire Clan and the strongest demon in Demon Realm, needs to go to the mortal realm as his grandfather's order... An immure former Viper Lord become his proactive secrecy bodyguard. A mysterious powerful man, who is the head of A Hospital. His childhood friend. A overly easily jealous grim reaper becomes his companions. With his mate and the others together, they guided and supported him till the end of his mission.