I have a Theory that Mio is not who she says she is. She wants them to redo their lives, but also wants them to find love and told them not with each other. That would create romantic tension between them due to it being forbidden seeing how this series is moving. I believe that she is their granddaughter from the future and she is there to ensure that they truly fall in love with each other.
Edited by lygarx, 22 August 2016 - 07:37 PM.