There are a group of friends, in a world full of magical creatures, who discover a portal to a dimension. This certain dimension houses millions of dragons. They are all released into their world, without a forewarning. Some of the group says that they need to destroy the dragons, while a majority of them wish to find them and send them back to their rightful place. Others fight for their rights to travel between worlds, and attempt to domesticate them with their training abilities and magical powers. Once the friends enter into the dragon world, they come back as hybrids so they can tame their ancestors.

(I'm willing to double and triple.)