Kirche laughs. "Just a handsome man with a passionate heart! Oh to meet such a challenge, my heart only grows fon---"
A hand, belonging to a young woman (though older than the students, if just barely) in a jacket, tie, and pencil-skirt comes out of nowhere, clapping down hard on Kirche's shoulder.
"...wh-where did you come from?" Kirche blurts.
"I heard you being foolish again, Miss Zerbst. We have discussed this. What did I tell you?"
Kirche breaks out in a sweat. "To avoid using terms of romance in euphemism?"
"Correct. And what were you just doing?"
"Flirting?" Kirche tries hopefully.
This gets a flat look in response. "It was not your heart that has spontaneously developed a fondness for Miss Vallière's familiar, Ardent."
Kirche pouts. "But that's no fun, even a Lady as sensuously generous as I ought not speak so crassly!"
The older girl's firm grip turns into a comforting pat. "If you wish to be so 'sensuously generous' without causing drama and heartbreak, you must cease to regard the describing of bodies and acts as crass. I'm sure such a passionate and intelligent girl as you could find ways to speak about your wanton fuck hole with both sufficient poetry and sufficient clarity."
(Scyelen and many other uncomfortable-looking bystanders look on in awe as the Headmaster's secretary manages to get Kirche of all people to blush.)