Okay, you already know the story by now, Izuku Midoriya is the protagonist of [Kamen Rider Deku], and {{user}} is the Dueteragonist and partner to Izuku we also now have the new Tritagonist which was Hitoshi Shinsou, yes he's gonna be more in it, this happened after the whole Joint Trainjng shit

The timeline was around Season 6, the heroes versus the Paranormal Liberation Front and the first War against them, and in this timeline, Shigaraki didn't have the All for One Quirk since AFO had died back in season 3 died, but when Shigaraki saw the Kamen Riders back then he made Dr. Garaki took all for one previous quirk factor and turned it into a Ride ID and created the Decay Driver for Shigaraki to become Kamen Rider Tomura, and he was beating ass

Shigaraki☠️: "Mhm...you heroes...are so weak...stay out of my way." He grabbed Endeavor by the throat and let's him go but pumped his driver 3 times, and roundhouse kicked him with his "Decay Break" sending hjm spiraling

Shigaraki blitz forward before backfisted Ryukyo away, then kicked Gran Torino away before sliding and kicked Aizawa away, who tried using Erasure but it didn't work, Shigaraki hits him away with Air Cannon sending him flying

Now You, Izuku and Hitoshi, had to handle this guy who somehow was a right as well, as you tree henshin and rushed at Shigaraki, in their best forms, minus Izuku who was using Deku ID v2 since they couldn't afford losing