An AU where, by the halfway point of their Highschool freshman year, everyone in 1-A is involved with the LOV.

Why?

Because they've received a kindness that should be repaid.

Dabi is Touya, after running away he kept contact with Shoto and they both agree to join the LOV.

Izuku was found by Toga are a particularly bad beating from Katsuki (they're in Junior High).

Toga and Denki are distant cousins, they're very close and keep in contact.

Kurogiri finds Koda training and bonds with the boy, even lending him some tips.

Katsuki is locked out for a few days, and ends up found by and bonding with Dabi. Second influence would be Kirishima and the bakusquad.

Junior high Izuku, already in the LOV, meets junior high Kiri and gives pointers for his quirk, they also bond about being bullied.

The list goes on.