Just ask her... Simpler than is sounds, though

"S-so uh... P-P-Pyrrha..." He stammered.

"Seriously, Jaune?! Calm down! Just ask! Say the words!" He mentally screamed at himself.

"Uh... Yes, Master?" Pyrrha asked, clearly worried.

"So... I was um... I mean so there's this thing... It's... Uh..."

It was like suddenly words just didn't exist in his mind... But then they all came flooding out at once

"Iwasjuatwonderingifyouwantedtogotothedancetogether!" He practically yelled.

There was a moment of silence as Pyrrha kinda stared at him in shock... Before she started giggling

"Of course I want to" she laughed

Jaune felt a sudden weight off his shoulders

"But.... What about Yang?" Pyrrha asked.

"Well, she and I are technically still together. But as far as the rest of Beacon is concerned she's more of an... Incredibly doting friend with benefits type situation. And we'd like you to be part of that too, if that's alright... Oh but in case it comes up uh... YOU were the one to ask ME to the dance and you did it yesterday."

Pyrrha looked at him with confusion

"So... Neo kinda asked me to the dance earlier. I wanted to say yes for the sake of the Harem. But I knew it would draw unwanted attention. Plus I.... Wanted to go with you... I do owe her a dance though. I hoped that would keep plans on track."

Pyrrha smiled, wrapping her arms around him and looking longingly into his eyes

"You're so selfish. You get Me, Yang, and Neo?" She teased "and threesomes with me and Yang?"

"I-its not like that! Its--"

Pyrrha quickly silenced him with a kiss, before pulling away

"Thank you, Master" she smiled

And now...