I Wanted to Leave, but They Held Me and Wouldn't Let Go!

(There is a small theater, which has nothing to do with the plot) Yun Feifei couldn't figure it out. She suddenly learned that she was a vicious female supporting character, but she thought she had done nothing evil. The most disgusting thing is that when you meet the protagonist group, you will uncontrollably say to them the words of the original plot. Yun Feifei: What can you do if your spiritual roots are still good? It's not that I don't have a father or a mother, I'm the eldest daughter of the Yun family. (Not) Everyone: Yun Feifei, you are so disgusting! No abuse, no abuse, no abuse! The original heroine was betrayed by the time traveler at first, but she will come back later, so it can be said that the original heroine is not blackmailed. An innocent boy who was adopted as a child but was taken advantage of; A junior brother who has a noble status but was abducted and even tortured since childhood; Originally lively and cheerful, but saw with his own eyes that the people he loved died for him because of his incompetence; The moody and stubborn Demon Lord who loves his younger brother has never experienced a father's love since he was a child; The BT demon king who transformed from a dragon-slaying boy to a dragon; The ex-demon who has always been crazy; (except the last one, all others are clean) The original novel is called "I'm Not a Junior Sister"