OPM vs BNHA:
Genos (once named Touya) is the eldest son of Endeavor. He needs to talk to Shoto after the funeral of their father but is ashamed of how he left his family behind. Tears are shed and bonds are mended.
Saitama is just in the background not sure if he should be more concerned about Genos or that green-haired kid in the background crying gallons of tears.
On their 16th birthday (whichever soulmate is youngest) teens switch bodies with their soulmate. It’s fun and all except if you switch with the guy you keep teaming up with while in disguise as a certain rabbit-themed vigilante.
Aka: Izuku is a vigilante after he doesn’t get into UA (goes to
Shiketsu) and met Shoto while in disguise during the USJ incident, the fight with stain, and rescuing Bakugou. Now he has to figure out how to to get through a day bodyswapped with the son of Endeavor in the middle of UA campus without exposing himself as the Jade Rabbit.
Yagi Toshinori is a thirty-something-year-old man with a sunny disposition and a really troublesome homeroom class. He can no longer hold constant hours as a low-tier pro hero due to age but enjoys his teaching life all the same. He is revered for being the first quirkless pro hero who inspired the quirkless heroes of tomorrow. He prides himself on being able to steer bad students onto the right path and exhausting all other options before expulsion.
Aizawa Shouta is a jaded forty-something-year-old man whose injuries have finally caught up to him and he has to settle for a job teaching heroics at UA. His injuries from his battle with All for One and borrowed quirk have begun to be too much for his body and he has begun his training his successor. He’s also the number one hero btw.
Aizawa ends up stuck with Yagi as a mentor but refuses to be entranced by those big blue eyes. Yagi starts out letting his assumptions about the number one hero cloud his perception but learns that behind the battle-hardened exterior lies a man who just wants to help people.
Aka: Aizawa got One for All, Yagi became an underground hero and I mess around with the timeline. Everyone else is the same unless I get specific requests.
Soon after his first fight with All For One, a common mugger takes down the still wounded symbol of peace. A young hero named Eraserhead finds them and scares off the mugger but for Toshi, it is too late. Delirious from the pain, Toshi recognizes Aizawa from Nao’s descriptions and makes a last-ditch decision to give the fledgling hero his power so it doesn’t go the waste.
Aizawa is sure he’s just delirious so he puts the hair into his mouth without the intent to swallow it but while trying to tend to the older man’s wounds, he forgets and ends up swallowing the hair.
By some miracle, Toshi actually survives and is frantic to meet up with the underground hero he gave his quirk to before the poor guy explodes or something.
The Children of AFO
Midoriya isn’t quite sure whether to laud or fear the group of strangers scrambling to keep him and his injured classmates safe during the final fight with the League. They seem alright but there’s something oddly familiar about their wide eyes and nervous behavior.
When he is fatally wounded despite the battle being won, he wakes up not in heaven but on the couch of one of those strangers. She introduces herself as his half-sister.
They’re all his half-siblings.
Aka: after the final battle, Izuku is whisked away by his half-siblings and learns the truth about his fraternal family. Some are cool, some are scary, but most importantly they’re not trying to kill him.