I raised my childhood friend as a tyrant is a Manga/Manhwa/Manhua in english language, Manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

In the novel, he described as a short-lived childhood friend who turned on the switch of a tyrant in Namju. I died of sin on his behalf, as I was told in the novel. I thought I could go back to reality. … But why did I come back to ten years? Is the story twisted somewhere in the original? I can't help it! I thought I would succeed and return to reality this time... My tyrant's dream tree is so nice! --------------------------- “I don’t care about thrones.” "What?" What? Did you say this before regression? "What are you talking about. Become Emperor....” You have to meet Yeoju and flow the original. Then I will go back! "Vice." Jade's voice calling me was still low. “I can't let you go. … … That's for whatever reason.” Jade's eyes are behind the soft smile. … … I think this guy knows something.