The Selfish Demon Lord?

A male protagonist named Ginro. A 17 Year old kid, living in a small house who does part time job after school every night. he don’t know anything about his past or even his parents, he only knew that he grew up on orphanages. one day when he was asleep, there was a black shadow appeared on his dream and talk about being “Reincarnated”, when he woke up, he found himself in a middle of a forrest and had an evil power through on his entire body. what will Ginro do about his power?, he will used it to good or bad things?.