Politely turn her down.

She clearly seem pissed and you can't help but feel like you lost a friend.

The basement is grimy and dark. You follow the winding corridors and soon it is getting hard to see. Far worse you can't help but feel you you hear all manor of sounds. Howling, chocking, moaning and gagging just to name a few. The door in front of you appear to have sealed shut. Apparently you have to wait for a teacher.

You hear footsteps behind you and turn around.

You breath a sigh of relief as you see the teacher is female. Her body hidden under some very modest clothing, at least for this place. A black business attire with high-heels and stockings. What surprises you the most is the length of the skirt. It actually reaches past her knees. Her black hair in a bun as she passes you and open the door for the class.