So she's the semi-nudist big sis who helped build up his female resistance threshold.

... I don't get what Murakumo said at the end. What does Akiho have to do with Natsuki's perferences in women? Does he even have any preferences???

Admiral Hisamura said:

She's also a semi-nudist prodigy with so many achievements I'd rather not mention them.

I have... questions.