Shapeshifter

Yuuma is caught in a fierce battle and a pretty girl comes to his aid. Her name is Natia and she intends to protect him and the town from destruction. He greatly wishes to be able to help her, and that’s when a bright light envelops them and Natia’s weapon transforms into a giant sword. So a normal boy will become the key to saving the world... no, the universe!

[From Hau~ Omochikaeri!]