This is almost like Romeo and Juliet but one family is actually insane and would kill both on purpose. Maybe both families are a little crazy since the other did lock away their sons power
Wait if she was reincarnated and remembered her life since birth than why did she wet herself and cry when those kids bullied her. She should have been older than them technically and mental stronger just like she is now?
That looks like a Utena reference but she immediately edited her fantasy so they could fight together instead of giving up completely on being her knight lol