This is all All for one's fault...Tomura Shigaraki's suffering, or rather, Tenko Shimura's, is all his own doing from the very beginning. You have a quirk that allows you to travel into the past but only up to 15 years into the past and no more. You can't save Tenko from the pain of his family's tragedy, but you can save him from All for One and foil his plan...that's what you do. You go back and suddenly you find yourself on a sidewalk, it's 2015 the city is crowded and people are doing their thing, you look around, you look for him in the crowd when an old lady bumps into you for the rush...She looks scared, as if she's seen a ghost, so she apologizes and continues walking away at a brisk pace...So you turn around and see a figure that stands out among the people staring at her with dull, disappointed eyes...Eyes of someone who just saw his last hope go up in smoke... it's Tenko...His eyes remain on the lady who is leaving, one hand clutching his chest the other stretched out as if he wanted to reach something...This is your chance to save him, you are the last hope not only for the world but also for him.