I'm the Only One Who Didn't Know That Evil Girls Are Boys

It happened that Vivian was possessed by the dying heroine... In order to avoid her own tragic ending, Wei An approached the only "healing agent" - the evil girl "Raheel", and became a real prince with her. But... "I never considered Zuo a friend, Vivian" "Can you do this with other people?" Mom, wait a minute. Isn't she a villain?! How come my best friend turned into a boy?