
One day, my father gave me a boy slave. He said he saved him from the battlefield becauseof his good...
ML is a little crazy but it works. She transmigrated as the villainess & he was taken in by her father as a servant/treated terribly. She knew he was crazy and the original final boss so she tried to get her father to kick him out but in the end ML killed her father + the staff who mistreated him. He's the master of the tower etc. and they end up loving each other