Splintered Realities

Ren and Sota are two boys who try to stay hidden from the rest of our world. This is because they are from an alternate reality. They are here to find something that could change the future of everything in existence.
When they find what they're looking for in the hands of 16-year-old Rya they have to make the biggest decision of their lives. Would they be willing to terminate their only friend and the world they came to love? Or will they risk putting all of existence in danger?