Midoriya Izuku, determined to become a hero before ever meeting All Might, looks for another way. He might not have a quirk, but that can't be all that being a hero is about. He has the intelligence, the drive, the determination. All he needs now is to know how to use it. Enter Aizawa Shouta.

Izuku Midoriya was 5 when he lost his mother to a villain attack and was saved by the hero Eraserhead. 3 weeks later Aizawa decided to adopt him

After being hit with a age-regression quirk it's up to All-Might to look after Izuku until he grows back up. Dad-Might ftw!

It came as a complete surprise to the class when Aizawa announced to the class that they were have a bring your parent to school day. But when Izuku's mother falls ill on the morning of it, who is he supposed to take with him? Dad Might and other good stuff. Canonverse/canon divergence. Now with chapter 2!