"...What does a Boy School Festival look like? Maybe I should go to Hanadera this year to take a look."
She felt more like for pastime than for reference. Every year, Hanadera's School Festival was earlier than Lillian's.
Well, it's other people's business anyway. Yumi spoke in such a dreamy tone, but Yuki was quick to correct her.

"Not maybe; it is a must, isn't it?"
"Oh?"
"Isn't it already a custom between student bodies in Lillian and Hanadera to help out each other during School Festivals?"
"Ah!"
"What is with this reaction? Geez."
Hey, it is okay to keep such a lamenting face to yourself.

"Then Yuki, you are also coming to our school this year right? But in last year's Lillian School Festival only Kashiwagi-san came alone, so is it that not everyone need to come?"
"We are helping in accordance to your requests."
"Ah I see. So there is actually a possibly Yuki is coming. But I hate my family staring at me. Last year Mom and Dad yelled to come, but I had stopped them no matter what."
See? Yumi asked for Yuki's agreement, but Yuki turned silent for a while. Yumi pressed on about what the silence meant, and Yuki finally divulged with a grim face.

"...I went. Last year."
"You're kidding!?"
"Kashiwagi-senpai was taking part. So I was brought along unwillingly by the other seniors."
"What?"
Unwilling or not, the fact that he saw "Cinderella" didn't change.
"Why are you saying this after a year? Oh my, I couldn't believe it!"
Yumi seized her brother's cushion to hit him with it.

No way could she believe her brother had seen such a clumsy performance of Sister B. No way could she believe she had been kept in the dark till now, being carefree about it all the time. Yumi was completely discouraged by what a naive kid she had been.

"The subject had not been brought up again after that. I also imagined you would respond this way, so I had tried to stay silent. Humm. Even after a year, Yumi is still embarassed of it."
Even with around a year of difference in age, this formidable brother was analyzing the situation with a cool mind. Argh, how annoying. Or it should be how enviable. In terms of mental growth, maybe he had already surpassed her.