I Couldn’t Stop my Childhood Friend from Turning Into a Villain

I was reincarnated in an R-19 psychological novel where the sub-male lead was blinded by jealousy and imprisoned his sister, the heroine, with whom he doesn’t share a drop of blood. The problem is that she was reincarnated as the childhood friend of the sub-male lead. She was killed by the villain as the character who tried to help the heroine! From now on, she can prevent a terrible future by preventing this guy from becoming a villain. For years like that, she struggled to stop her childhood friend from turning into a villain. “Lucy, what are you doing there?” “Go away! You can’t look!” Or preventing him from seeing the heroine being confessed to……. “Your sister has brought you flo...