Izuku Midoriya gets teleported to another timeline when he's hit with an unknown quirk. He quickly figures that he's in the past,a fter Katsuki has been reacued from the L.O.V.

Izuku's breath hitches at the sight, his past self— in bed with past Katsuki,cuddling. He hardly recalls those good times.

The future has left him in grime.

He feels the need to fix it, fix it while he's still here in the past. Though,he doesn't know if the unknown quirk's effect is temporary or not.