Walking home from school one day during his Foreign Youth Exchange in Brazil, Evan Gamble encounters a green portal that he immediately recognizes to be a multidimensional portal, and tries but fails to escape it. He then finds himself in the world of My Hero Academia and in the company of the rather bizarre, villainous League of Witches, only to be saved by All Might and put under the care of the Midoriya household. Stuck in his new world without a way to return to his old one, Evan decides to live out his dream of being a superhero and applies for U.A., and thus embarks on a once-in-a-lifetime journey.
Tropes contained in Flashover:
- Acceptable Breaks from Canon: In the Entrance Exam, due to Evan being there and Shinsou gaining more points, Mineta and Koji were unable to enter Class 1-A. While it wasn't initially clear what their ultimate fate was, Mineta does show up later on, with the author confirming that they were simply bumped down to 1-B.
- Battle Harem: Lucifer has what is essentially one in the League of Witches. It's not stated outright that they have any love interests in Lucifer, but they do call a fifteen-year-old villain Lord, so...
- Cluster F-Bomb: Evan is understandably furious at being kidnapped away from his own world, go through a lot of bodily agony, and be mistaken for a guy named Lucifer. All of this leads to the first chapter being full of cussing. It's only the first chapter that does this, though.
- Comically Missing the Point: One of the unnamed members of the League of Witches in Chapter 1.Evan: Alright, dammit, first of all, while I appreciate you calling me Lord and all, I am just about the least royal person on this planet. And second of all, where the fuck am I, why the fuck did you bring me here, and take me the fuck back home.League of Witches member: ...Shouldnt that be second of all, third of all, and fourth of all?
- Evil Twin: Lucifer is this for Evan; they look very close to identical but Evan wants to be a hero, whereas Lucifer is a villain in alliance with the League of Villains.
- Genre Savvy: In chapter 1, Evan has watched enough anime, read enough manga, and written enough self-inserts to immediately recognize the green portal in front of him as being something that will take him to another world if he enters it. He even concludes that he has become a self-insert written by some other version of himself, and he isn't very happy about it. Hell, he tries to talk himself out of it by pointing out how big their workload is.
- Instant Cultured: One of the witches in the League of Witches has a Quirk that lets her make others instantly learn other languages; they pass out from the stress of all the info being added to their brain, though.
- Names to Run Away from Really Fast: In a world full of Punny Names like My Hero Academia, someone named after devil, AKA Lucifer, probably counts as this.
- Obfuscating Stupidity: Evan plays this with Shinsou to give him a confidence boost, pretending to be way more gung-ho and excited than he really is (in other words, more like a typical shonen protagonist), mostly so he can chat up how awesome Shinsou's mind control powers are without seeming weird about it.
- Power at a Price: Everyone born in another world, taken into the My Hero Academia world by Salem's One-Way Dimensional Portal Quirk, gains a Quirk of their own as a result, but it usually kills them. Evan and Lucifer are the only two people to have survived the portal, and Evan was in so much pain that he had to be hospitalized for two weeks after the incident.
- The Quiet One: Shinsou isn't a man of very many words. Given his Quirk and his own personal reaction to its usage, this makes sense.
- Self-Insert: Evan is inserted into the story of My Hero Academia a short while after the Sludge Villain incident.
- Spotting the Thread: Tsuyu immediately figures something's off about Evan when he enters class 1-A, since he seems to know who everyone is (despite that they should all be strangers to one another).
- Super Smoke: Played with in that Evan's Smoke Quirk allows him to expel Quirk from his body, thus leaving him in a transparent, ghost-like state in which he can neither interact with the rest of the world nor be interacted with.
- Trapped in Another World: Due to the fact that Salem's Quirk only works as a one-way gate, Evan is left unable to return to his home world.
- Villain Team-Up: Lucifer and the League of Witches decide to team up with the League of Villains to take down All Might in chapter 3.
- What the Hell, Hero?: Evan takes no time calling out his middle-school teacher on cutting off Izuku's attempt to stand up for himself, while letting Bakugo bully and insult Izuku with no consequences.