Highschool of Demons & Priests; Book 2: Travel to a different world

A year has passed now since the final battle against Mania and Madness. Mark and his friends had a relatively normal live now for this last year. However, things start to change after Mark wakes up because he felt a sudden shock in the middle of the night on the day they ended the war. After that night one rumour after the other reaches his friends and him. On one mission things get heated and they find Pain still alive. Our friends try to confront him and get their old friend back. However, because of an accident their Demon Sides get transported together with Pain into a different world. Scared Mark and his friends travel back for Caro and Masons help, who call Luxilia and Sombra after they hear what had happened. After they recovered our friends start looking for a way to get their partners back.
In the meantime our lovely Demon Sides land in our world, but sadly because of Pain they were separated during the teleport and appeared all over the world. So now they have to find each other again before they can look for a way back to their home.

Side story: Luxilia and Sombra decide to look for a way to get their father back and go on their own little adventure.