Barry Allen's eleventh year was both the best and the absolute worst of his life. On his eleventh birthday he received a strange letter from an even stranger school, claiming the clever and level headed child was, in fact, a wizard. So he was whisked off for an exciting and magical year at Hogwarts School of Witchcraft and Wizardry. And he excelled.
Barry was a remarkably talented young boy, and he always had been. He and Hermione Granger got on rather well. That talent followed him into the magical world. Magic came easily to him, and he quickly made friends, while still keeping a low profile. He revelled in magic. But he never lost his fascination with muggle science. He read books his friends and classmates didn't understand. Everything was looking up.
Then, that summer, it all came crashing down. He went home to Central City in the states, and his mother was murdered by something impossible, even for magic. He moved in with Joe and Iris, and his father was put in jail. It was all falling apart, and that only made Barry even more determined to hold it together. He continued in Hogwarts, even more driven than before, he became close with Iris, who was told he went to a special school for prodigies, and Joe, who knew the truth. He studied science with even more fervor than magic. And he was very good at it.
Then there was the basilisk. It tormented the school, everyone was frightened. He was one of the only Hufflepuffs that didn't believe Harry Potter was the 'Heir of Slytherin'. Then Sirius black was on the loose. The next year the Tri-Wizard tournament happened, and poor Harry Potter was once again put through the wringer. Once again, Barry was one of the few who believed the boy. Then Cedric Diggory was murdered. Barry knew Cedric, he liked the older Hufflepuff. It brought back painful memories of losing his mother when there was nothing he could do.
Then that horrible Umbridge woman came to school. Barry happily joined the DA, and was one of many who endured her painful detentions. Then Dumbledore died. Everything went really south. Joe pulled him out, much to Barry's protests. But what could he do? He was sixteen, a muggle born fascinated by muggle science. He was a huge target, and Joe refused to allow it. He read the Prophet, and knew something was wrong.
Barry helped as best as he could from afar, sending supplies and spells and anything else he could, but there just wasn't much that he could do. Then the war ended. He went back and graduated with flying colors from Hogwarts. After that he went to a muggle college, distancing himself from the magical world, determined to catch who killed his mother and free his father. He got a job as a forensic scientist, and quietly pined after Iris. He lived, unlike many of his friends.
Then the particle collider exploded, and he was hit. His life changed. Iris fell in love with Eddie, which was agony, and he woke up with powers that had nothing to do with his magic. Though they would have certainly helped when he was the Hufflepuff chaser. (The hat had a tough choice between Gryffindor, Ravenclaw, and Hufflepuff, before deciding his loyalty outweighed the other traits).
He worked with S.T.A.R labs, became the flash, saved lives, and he was that much closer to catching the Man in the Yellow Suit. His life was almost good. His wand and spell books were gathering dust in his old trunk in the closet. He had left that life behind, for the most part. It was too good to be true.