If Yumi talked to Tsutako (蔦子) or Mami (真美), they would most probably jump on their feet to follow. But it was supposed to be private, and Yumi just didn't feel comfortable to do what she wanted under the surveillance of Photo Club and Newspaper Group. On the other hand, if the two were invited on the condition of no camera and no news coverage, it would be just to cruel to them.

"Why not invite Touko (瞳子)-chan?"
Mumbling without much thinking, Yumi heard yet another outburst from Yoshino from the other side of the phone.
"Stupid Stupid Stupid Stupid! Aren't you stupid or something, Yumi?"
"You don't need to use so many 'stupid' on me."
A total of five by finger count.
"This is just stupid!"
Oh, sixth.

"What are you up to by calling your rival out? At a place like the Ogasawara's summerhouse, you are having your debut and away game. Under such disadvantages, do you really think you are fighting on the same ground with that cheeky hair-roll?"
"Away..."
A clever analogy that surely from Yoshino, a sports watching fan.

"So Touko-chan is the home team?"
"Of course she is. Though not blood-related, she and Sachiko-sama are relatives."
"Oh, yes."
Now Yumi was reminded. She had completely forgotten about it.

"What is wrong with the weaker side sending salt to the stronger side to rub on his wounds?"
"E- Exactly"
Exactly as you said.
"Now you got it. Never ever invite her! And don't drop any stupid ideas to Sachiko-sama!"
"You are pretty scary, Yoshino."

"You are too considerate, Yumi, so I am concerned about you. I know what term describes you best: 'Ohitoyoshi (お人好し)' (People who are overly kind and considerate without thinking, and often ends up giving up their rights or hurting themselves.)"
"Argh--"
How harsh it is to be unable to refute. Upon Yumi's silence, Yoshino continued her arguments with increasing vigor.

"Just tell Sachiko-sama, let's go for the two of us only. Okay? Got it?"
Overwhelmed by such pressure, Yumi could only nod on the spot for the time being--