My. My. My. Goodness. Gracious. Maria-sama!
This is such a classic yuri Onee-sama trope that just never gets old.
Can't help but stupidly grin while imagining Satsuki as Sachiko!
This reminds me of this particular scene in Marimite:
"By the way, Yumi."
After school, as they walked over the fallen gingko leaves, Sachiko-sama spoke with mischievous eyes.
"From now on, if you call me 'Sachiko-sama,' I won't reply."
"What?"
"Because. You're not trying to change what you call me."
And with that, Sachiko-sama turned her back to Yumi and kept walking. She'd said what she wanted to say, after all.
"Sachiko-samaaa"
Even though she chased after her, she held steadfastly to her resolution.
"If you don't want to be ignored, address me properly."
You get it, don't you, she seemed to say, and she kept walking without even glancing behind her. Yumi played with her hair. It felt somewhat awkward.
"…e-sama."
"I didn't hear yoooou."
She was going to force Yumi to say it. Yumi looked around. Luckily, Maria-sama wasn't looking. "Onee-sama!"
Yumi's voice was awful clear in the middle of the gingko pathway. And then her onee-sama, as pretty as Maria-sama, turned around, answered with her own, clear "Yes?" and smiled, satisfied.
Kyah! Kyah! Kyah! Medic! Please call me a medic!