Another world

Sitting in a boring class with a boring teacher Luna decided to trow some paper over to her best friend Amalia. The paper ends up on the teachers desk. Luna of course gets detention. After school everyone left except Luna, the teacher and Amalia. The teacher leaves for unknown reasons and the two girls decides to stay a little longer. Amalia has to go to the toilet but just as shes about to leave she finds two beautiful rings. The two girls decides to put them on. What they don't know is that the ring would change their lives forever. They both woke up in some unknown would with nothing but eachother and this myserios blue dragon. Will they survive? How are they supposed to get out? And who exactly is this dragon?