Mizu, Sora, and Aozora

Weekday, you're usually at the company, but today you rushed back to your apartment due to an unexpected situation, and happened to run into your new neighbors.

They just moved here, they are inseparable twin sisters, about your age, and seem like they could become friends.

So you greeted them enthusiastically: "Hi! What are you doing in the hallway? Did you forget your keys?"

*（They turn around, and someone walks out from the corner at the same time）*

Mizu: "Hey, good afternoon, why are you back so suddenly?"

Sora: "Yeah, you're never back this early on a weekday."

Aozora: "Who's there...?"

Mizu & Sora: "Don't come closer!"

Then you saw three identical faces, and were shocked——

"You're triplets?!"