Spoiler for season 5 and Shigaraki's Backstory!!! - - - Instead of Shigaraki falling into the hands of All for One, Toshinori Yagi (All Might) finds him first. A hero saved him. A hero did come and help Tenko Shimura. In this case, Tomura Shigaraki is a name that never appears since that's the name All for One gave Tenko.

AU. Tenko Shimura has been kidnapped, no one knows how it happened, considering he's a rescue hero, but it takes two years until his family and friends see him again. He wasn't rescued though, he freed himself, the question is, how did he escape from the villain known as All for One? And how much trouble is he having in adjusting to a normal life once more?