Millie is a 17 years old girl, she attended Peri high, an Unordinary school in an Unordinary world.

Where almost everyone is born with a quirk and a rank, but not everyone, 0.004% of the population are cripples, a non magic folk, kinda like muggle in Harry Potter.

Peri High is a popular school known for their powerful students and...where high tiers look down on low tiers, thinking they're better with a higher level and more important (It's actually really normal in this city)

Millie kept herself on low profile, lying about her quirk and rank, she pretended to be a cripple, wanting to make real friends who doesn't care about her rank and quirk.

While hiding a dark secret, trying to hide and forget her past, she stayed hidden.

A new kind of Unordinary.