The Day Class 1-A Babysat a Hero

Class 1-A thought they could handle anything.

Villains.
Training battles.
Hero internships.

But nothing prepared them for Echiko Kirishima.

When Eijiro Kirishima's four-year-old little sister suddenly spends the day at the U.A. dorms, the students quickly learn one thing:

Babysitting a tiny hero with a Hardening quirk is way harder than fighting villains.

Echiko runs everywhere, headbutts furniture, steals hero equipment... and for some reason becomes completely obsessed with one very angry student.

Katsuki Bakugo.

She calls him "Boom Boom Hero."

She follows him everywhere.

And no matter how much he yells... she refuses to leave his side.

Now the entire dorm is in chaos as Class 1-A tries to survive a day of babysitting, hero training disasters, and a four-year-old who might be the most unstoppable force at U.A.

Because sometimes the greatest challenge for future heroes...

is daycare.

Disclaimer:

I do not own My Hero Academia or its characters. All rights belong to Kohei Horikoshi and the creators of the series. This is a fan-made story written for fun and entertainment.