The Ultra Hero Of The Omniverse (Male Reader X Ben 10 Series)

Y/N Tennyson, the older brother of Ben Tennyson, and the future boyfriend of his childhood best friend, Julie Yamamoto. He along with Julie went on a summer trip with the Tennysons, when Ben and Max invited them to go with them. They both agreed as they both want to spend more time with each other and they both also have crushes on each other. But, during the first night of their summer trip with the Tennysons, he and Ben both found watches that changed their lives forever...