There should be more My Hero Academia au for Osomatsu-san. I thought of one once that is basically an age au:
Osomatsu(21): Shoots water out of his nipples.
Karamatsu(17): Jarringly sparkly skin that can become brighter by will.
Choromatsu(14): Can set things on fire by touching them.
Ichimatsu(10): Permanent cat person(except maybe human feet). Can jump pretty high and scratch and has other cat senses.
Jyushimatsu(6): Can divide himself into smaller Jyushimatsus. He can divide himself as much as he wants(which is really stressful for the other).
Todomatsu(2): Hasn’t discovered his quirk yet.
But like…has anyone else ever thought of what quirks the Matsus would have? I’m interested in hearing other people’s ideas.