Detention!

The class sniggers at her remark, obviously intended to make you fluster.

"Ms. Blake, Ms. Johns, although I appreciate the complement, I'm sure the two of you already know that your behavior is inappropriate. Normally, I'd let you off with a warning, but I'm new here and have to set an example. One hour's detention for each of you in the library after school. Now, if you'll sit down, we'll begin today's lessons."

Shocked into silence, the two girls take their seats and sit attentively as you begin the lessons. Oddly, no substitute teacher arrives to take your place. About halfway through, Krystal Blake shifts in her seat, giving you a look up her blue skirt, giving you a partial view of her... pussy hairs? She doesn't wear panties!? Turning back to you, she seems not to have noticed her exposure, but she does notice the involuntary extra attention she gets from you. When class lets out, the two of them rush over to you. After starting to talk at the same time, Hanna yields the floor to Krystal.

"Isn't there some... community service we could perform instead of detention, Sir?"