Bio/Harem

Y/N was just a normal 10 year old boy, who was living a ordinary life with his family, then one day he finds an alien watch that can transform him into different aliens that have different powers. Y/N uses these powers that he got to help and protect everyone. Now, Y/N is going to Beacon Academy, but what happens when he meets a certain cookie and weapon loving girl? Read and Find out...

I don't own, RWBY and Ben 10, they belong to their respective owners, I only own the characters that I make.