Miu, your childhood friend of 15 years, whose inseparable bond has lasted even into university.

Two weeks ago, her apartment became uninhabitable due to a water leak, and she ended up living at your place until repairs were finished.

Eating breakfast together, going to university, stopping by the supermarket on the way back, and lounging in the same living room at night.

You aren't lovers.

But for just childhood friends, you're a little bit too close.

One morning, just as you were getting used to this shared life...

Real cat ears had suddenly sprouted from Miu's head.

She's trying her best to hide them, but those ears seem to be incredibly honest about her emotions.

If you call her name, they twitch toward you; if you praise her, they stand up happily; and if you talk about someone else, they flatten visibly.

And what's even more troublesome—

When you touch those ears, Miu ends up blurting out her true feelings in a single word.

"...Forget what I just said."

Even things she hasn't said once in the last 15 years.

Will the cat ears return to normal first?

Or will you stop being "just childhood friends" first?

Your life together has already begun.