Reincarnated to Harry Potter World as... RHPWT

A boy wakes up in his grave, the story progresses and he finds himself to be in Harry Potter world, his memories from his last life are unlocked, he finds immense joy in the fact that he Harry's twin brother, his only wish being able to protect his brother and avenge his parents, however, what would happen when a threat unknown and of a much larger scale lurks in shadows. Will he able to protect his loved ones, find out in the next episode of Dragon Ball Z. (kidding, have fun.)

(Note: the cover picture isn't mine.)