...Ah? But there's also a chance she's his wife...

I am Natsuki's older sister.

However, I'm our father's... Natsuki is our mother's child from a previous marriage, so the chance for that is certainly not zero...

Well, leaving that for later...

For now, shall we be talking about the product?

Aah... I suppose. Please do.

At first, it started from a request from Natsuki's unit asking us whether we have high-functioning undergarments for women.

Just to mention, we do have sport-oriented ones, but if they were to be used on the battlefield, it would be too undependable.

One thing lead to another, the final product is this right here.

Look, look, admiral!! This is awesome!!

We concluded we might as well design it from scratch... or so things went.